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<p><centered><point26>X.</point26></centered></p>

<p><ent>X</ent><br/
<hw>X</hw> <pr>(<ecr/ks)</pr>. <def>X, the twenty-fourth letter of the
English alphabet, has three sounds; a compound nonvocal sound (that of
<xex>ks</xex>), as in <xex>wax</xex>; a compound vocal sound (that of
<xex>gz</xex>), as in <xex>example</xex>; and, at the beginning of a
word, a simple vocal sound (that of <it>z</it>), as in
<xex>xanthic</xex>. See <xex>Guide to Pronunciation</xex>, <sect/<sect/
217, 270, 271.</def><br/
[<source>1913 Webster</source>]</p>

<p><note> The form and value of X are from the Latin X, which is from
the Greek <CHI/, which in some Greek alphabets had the value of
<xex>ks</xex>, though in the one now in common use it represents an
aspirated sound of <xex>k</xex>.</note><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthamide</ent><br/
<hw>Xanth*am"ide</hw> <pr>(?)</pr>, <pos>n.</pos>
<ety>[<ets>Xanth</ets>ic + <ets>amide</ets>.]</ety> <fld>(Chem.)</fld>
<def>An amido derivative of xanthic acid obtained as a white crystalline
substance, <chform>C2H5O.CS.NH2</chform>; -- called also
<altname>xanthogen amide</altname>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthate</ent><br/
<hw>Xan"thate</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[See
<er>Xanthic</er>.]</ety> <fld>(Chem.)</fld> <def>A salt of xanthic; a
xanthogenate.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthelasma</ent><br/
\'d8<hw>Xan`the*las"ma</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL.; Gr.
<grk>xanqo`s</grk> yellow + <grk>'e`lasma</grk> a metal plate.]</ety>
<fld>(Med.)</fld> <def>See <er>Xanthoma</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthian</ent><br/
<hw>Xan"thi*an</hw> <pr>(?)</pr>, <pos>a.</pos> <def>Of or pertaining to
<etsep>Xanthus</etsep>, an ancient town on Asia Minor; -- applied
especially to certain marbles found near that place, and now in the
British Museum.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthic</ent><br/
<hw>Xan"thic</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[Gr.
<grk>xanqo`s</grk> yellow: cf. F. <ets>xanthique</ets>.]</ety><br/
[<source>1913 Webster</source>]</p>

<p><sn>1.</sn> <def>Tending toward a yellow color, or to one of those
colors, green being excepted, in which yellow is a constituent, as
scarlet, orange, etc.</def><br/
[<source>1913 Webster</source>]</p>

<p><sn>2.</sn> <fld>(Chem.)</fld> <sd>(a)</sd> <def>Possessing,
imparting, or producing a yellow color; <as>as, <ex>xanthic</ex>
acid</as>.</def> <sd>(b)</sd> <def>Of or pertaining to xanthic acid, or
its compounds; xanthogenic.</def> <sd>(c)</sd> <def>Of or pertaining to
xanthin.</def><br/
[<source>1913 Webster</source>]</p>

<p><cs><col><b>Xanthic acid</b></col> <fld>(Chem.)</fld>, <cd>a heavy,
astringent, colorless oil, <chform>C2H5O.CS.SH</chform>, having a
pungent odor. It is produced by leading carbon disulphide into a hot
alcoholic solution of potassium hydroxide. So called from the yellow
color of many of its salts. Called also <altname>xanthogenic
acid</altname>.</cd> -- <col><b>Xanthic colors</b></col>
<fld>(Bot.)</fld>, <cd>those colors (of flowers) having some tinge of
yellow; -- opposed to <contr>cyanic colors</contr>. See under
<er>Cyanic</er>.</cd></cs><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthide</ent><br/
<hw>Xan"thide</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[See
<er>Xantho-</er>.]</ety> <fld>(Chem.)</fld> <def>A compound or
derivative of xanthogen.</def> <mark>[Archaic]</mark><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthidium</ent><br/
\'d8<hw>Xan*thid"i*um</hw> <pr>(?)</pr>, <pos>n.</pos>;
<plu><it>pl.</it> <plw>Xanthidia</plw> <pr>(?)</pr>.</plu> <ety>[NL.,
fr. Gr. <grk>xanqo`s</grk> yellow.]</ety> <fld>(Bot.)</fld> <def>A genus
of minute unicellular algae of the desmids. These algae have a rounded
shape and are armed with glochidiate or branched aculei. Several species
occur in ditches, and others are found fossil in flint or
hornstone.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthin</ent><br/
<hw>Xan"thin</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xanqo`s</grk> yellow.]</ety> <sn>1.</sn> <def>same as
<er>xanthine</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><sn>2.</sn> <fld>(Chem.)</fld> <def>A yellow insoluble coloring
matter extracted from yellow flowers; specifically, the coloring matter
of madder.</def> <altsp>[Formerly written also
<asp>xanthein</asp>.]</altsp><br/
[<source>1913 Webster</source>]</p>

<p><sn>3.</sn> <fld>(Chem.)</fld> <def>One of the gaseous or volatile
decomposition products of the xanthates, and probably identical with
carbon disulphide.</def> <mark>[Obs.]</mark><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthin</ent><br/
<ent>Xanthine</ent><br/
<mhw>{ <hw>Xan"thine</hw> <pr>(?)</pr>, <pos>n.</pos> Also
<hw>Xan"thin</hw> }</mhw>. <ety>[Gr. <grk>xanqo`s</grk> yellow.]</ety>
<fld>(Physiol. Chem.)</fld> <def>A type of purine obtainable as a white
microcrystalline powder, <chform>C5H4O2N4</chform>, present in muscle
tissue, in the liver, spleen, pancreas, and other organs, and also in
urine (in small quantities) and some urinary calculi, and in the juices
of certain plants; -- so called because it leaves a yellow residue when
evaporated to dryness with nitric acid. It is also present in guano.
Xanthine is closely related to uric acid.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xanthinine</ent><br/
<hw>Xan"thi*nine</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xanqo`s</grk> yellow + qu<ets>inine</ets>.]</ety>
<fld>(Chem.)</fld> <def>A complex nitrogenous substance related to urea
and uric acid, produced as a white powder; -- so called because it forms
yellow salts, and because its solution forms a blue fluorescence like
quinine.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthium</ent><br/
\'d8<hw>Xan"thi*um</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., fr. Gr.
<grk>xa`nqion</grk> a plant used for dyeing the hair yellow, said to be
the <spn>Xanthium strumarium</spn>, from <grk>xanqo`s</grk>
yellow.]</ety> <fld>(Bot.)</fld> <def>A genus of composite plants in
which the scales of the involucre are united so as to form a kind of
bur; cocklebur; clotbur.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xantho-</ent><br/
<hw>Xan"tho-</hw> <pr>(?)</pr>. <def>A combining form from Gr.
<grk>xanqo`s</grk> yellow; as in <ex>xantho</ex>cobaltic salts. Used
also adjectively in chemistry.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthocarpous</ent><br/
<hw>Xan`tho*car"pous</hw> <pr>(?)</pr>, <pos>a.</pos>
<ety>[<ets>Xantho-</ets> + Gr. <grk>karpo`s</grk> fruit.]</ety>
<fld>(Bot.)</fld> <def>Having yellow fruit.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthochroi</ent><br/
\'d8<hw>Xan*thoch"ro*i</hw> <pr>(?)</pr>, <pos>n. pl.</pos> <ety>[NL.
See <er>Xanthochroic</er>.]</ety> <fld>(Ethnol.)</fld> <def>A division
of the Caucasian races, comprising the lighter-colored
members.</def><br/
[<source>1913 Webster</source>]</p>

<p><q>The <qex>Xanthochroi</qex>, or fair whites, . . . are the
prevalent inhabitants of Northern Europe, and the type may be traced
into North Africa, and eastward as far as Hindostan.</q>
<rj><qau>Tylor.</qau></rj><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthochroic</ent><br/
<hw>Xan`tho*chro"ic</hw> <pr>(?)</pr>, <pos>a.</pos>
<ety>[<ets>Xantho-</ets> + Gr. <grk>chro`a</grk> color.]</ety>
<fld>(Ethnol.)</fld> <def>Having a yellowish or fair complexion; of or
pertaining to the Xanthochroi.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthochroid</ent><br/
<hw>Xan"tho*chroid</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[See under
<er>Xanthrochroic</er>, <er>-oid</er>.]</ety> <fld>(Ethnol.)</fld>
<def>Having a yellowish or fair complexion.</def> -- <def2><pos>n.</pos>
<def>A person having xanthochroid traits.</def></def2><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xanthochroism</ent><br/
<hw>Xan*thoch"ro*ism</hw> <pr>(?)</pr>, <pos>n.</pos> <def>Abnormal
coloration of feathers in which yellow replaces the normal color, as in
certain parrots. It is commonly due to lack of the dark pigment which
with yellow forms green.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xanthodontous</ent><br/
<hw>Xan`tho*don"tous</hw> <pr>(?)</pr>, <pos>a.</pos>
<ety>[<ets>Xantho-</ets> + Gr. <grk>'odoy`s</grk>, <grk>'odo`ntos</grk>,
tooth.]</ety> <def>Having yellow teeth.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthogen</ent><br/
<hw>Xan"tho*gen</hw> <pr>(?)</pr>, <pos>n.</pos>
<ety>[<ets>Xantho-</ets> + <ets>-gen</ets>.]</ety> <fld>(Chem.)</fld>
<sd>(a)</sd> <def>The hypothetical radical supposed to be characteristic
of xanthic acid.</def> <mark>[Archaic]</mark> <sd>(b)</sd>
<def>Persulphocyanogen.</def> <mark>[R.]</mark><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthogenate</ent><br/
<hw>Xan"tho*gen*ate</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Chem.)</fld>
<def>A salt of xanthic acid.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthogenic</ent><br/
<hw>Xan`tho*gen"ic</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[See
<er>Xantho-</er>, and <er>-gen</er>.]</ety> <fld>(Chem.)</fld>
<def>Producing a yellow color or compound; xanthic. See <cref>Xanthic
acid</cref>, under <er>Xanthic</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthoma</ent><br/
\'d8<hw>Xan*tho"ma</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL. See
<er>Xantho-</er>, and <er>-oma</er>.]</ety> <fld>(Med.)</fld> <def>A
skin disease marked by the development or irregular yellowish patches
upon the skin, especially upon the eyelids; -- called also
<altname>xanthelasma</altname>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthomatous</ent><br/
<hw>Xan*thom"a*tous</hw> <pr>(?)</pr>, <pos>a.</pos> <fld>(Med.)</fld>
<def>Of or pertaining to xanthoma.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xanthomelanous</ent><br/
<hw>Xan`tho*mel"a*nous</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[Pref.
<ets>xantho-</ets> + Gr. <?/, <?/, black.]</ety> <fld>(Ethnol.)</fld>
<def>Of or pertaining to the lighter division of the Melanochroi, or
those races having an olive or yellow complexion and black
hair.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xanthophane</ent><br/
<hw>Xan"tho*phane</hw> <pr>(?)</pr>, <pos>n.</pos>
<ety>[<ets>Xantho-</ets> + Gr. <grk>fai`nein</grk> to show.]</ety>
<fld>(Physiol.)</fld> <def>The yellow pigment present in the inner
segments of the retina in animals. See <er>Chromophane</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthophyll</ent><br/
<hw>Xan"tho*phyll</hw> <pr>(?)</pr>, <pos>n.</pos>
<ety>[<ets>Xantho-</ets> + Gr. <grk>fy`llon</grk> leaf.]</ety>
<fld>(Bot.)</fld> <def>A yellow coloring matter found in yellow autumn
leaves, and also produced artificially from chlorophyll; -- formerly
called also <altname>phylloxanthin</altname>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthopous</ent><br/
<hw>Xan"tho*pous</hw> <pr>(?)</pr>, <pos>a.</pos>
<ety>[<ets>Xantho-</ets> + Gr. <grk>poy`s</grk>, <grk>podo`s</grk>,
foot.]</ety> <fld>(Bot.)</fld> <def>Having a yellow stipe, or
stem.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthoproteic</ent><br/
<hw>Xan`tho*pro*te"ic</hw> <pr>(?)</pr>, <pos>a.</pos> <fld>(Physiol.
Chem.)</fld> <def>Pertaining to, or derived from, xanthoprotein; showing
the characters of xanthoprotein; <as>as, <ex>xanthoproteic</ex> acid;
the <ex>xanthoproteic</ex> reaction for albumin.</as></def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthoprotein</ent><br/
<hw>Xan`tho*pro"te*in</hw> <pr>(?)</pr>, <pos>n.</pos>
<ety>[<ets>Xantho-</ets> + <ets>protein</ets>.]</ety> <fld>(Physiol.
Chem.)</fld> <def>A yellow acid substance formed by the action of hot
nitric acid on albuminous or proteid matter. It is changed to a deep
orange-yellow color by the addition of ammonia.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthopuccine</ent><br/
<hw>Xan`tho*puc"cine</hw> <pr>(?)</pr>, <pos>n.</pos>
<ety>[<ets>Xantho-</ets> + <ets>pucc</ets>oon + <ets>-ine</ets>.]</ety>
<fld>(Chem.)</fld> <def>One of three alkaloids found in the root of the
yellow puccoon (<spn>Hydrastis Canadensis</spn>). It is a yellow
crystalline substance, and resembles berberine.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthorhamnin</ent><br/
<hw>Xan`tho*rham"nin</hw> <pr>(?)</pr>, <pos>n.</pos>
<ety>[<ets>Xantho-</ets> + NL. <ets>Rhamnus</ets>, the generic name of
the plant bearing Persian berries.]</ety> <fld>(Chem.)</fld> <def>A
glucoside extracted from Persian berries as a yellow crystalline powder,
used as a dyestuff.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthorhiza</ent><br/
<hw>Xan`tho*rhi"za</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., fr. Gr.
<grk>xanqo`s</grk> yellow + <grk>"ri`za</grk> root.]</ety>
<fld>(Bot.)</fld> <def>A genus of shrubby ranunculaceous plants of North
America, including only the species <spn>Xanthorhiza apiifolia</spn>,
which has roots of a deep yellow color; yellowroot. The bark is
intensely bitter, and is sometimes used as a tonic.</def><br/
[<source>1913 Webster</source>]</p>

<p><-- p. 1671 --><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthorhoea</ent><br/
\'d8<hw>Xan`tho*rhoe"a</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., from
Gr. <grk>xanqo`s</grk> yellow + <grk>"rei^n</grk> to flow.]</ety>
<fld>(Bot.)</fld> <def>A genus of endogenous plants, native to
Australia, having a thick, sometimes arborescent, stem, and long
grasslike leaves. See <er>Grass tree</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthose</ent><br/
<hw>Xan"those</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Chem.)</fld>
<def>An orange-yellow substance found in pigment spots of certain
crabs.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthosis</ent><br/
\'d8<hw>Xan*tho"sis</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., fr. Gr.
<grk>xanqo`s</grk> yellow.]</ety> <fld>(Med.)</fld> <def>The yellow
discoloration often observed in cancerous tumors.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthospermous</ent><br/
<hw>Xan`tho*sper"mous</hw> <pr>(?)</pr>, <pos>a.</pos>
<ety>[<ets>Xantho-</ets> + Gr. <grk>spe`rma</grk> sperm.]</ety>
<fld>(Bot.)</fld> <def>Having yellow seeds.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthous</ent><br/
<hw>Xan"thous</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[Gr.
<grk>xanqo`s</grk> yellow.]</ety> <def>Yellow; specifically
<fld>(Ethnol.)</fld>, of or pertaining to those races of man which have
yellowish, red, auburn, or brown hair.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthoxylene</ent><br/
<hw>Xan*thox"y*lene</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[See
<er>Xanthoxylum</er>.]</ety> <fld>(Chem.)</fld> <def>A liquid
hydrocarbon of the terpene series extracted from the seeds of a Japanese
prickly ash (<spn>Xanthoxylum pipertium</spn>) as an aromatic
oil.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xanthoxylum</ent><br/
\'d8<hw>Xan*thox"y*lum</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., from
Gr. <grk>xanqo`s</grk> yellow + <grk>xy`lon</grk> wood.]</ety>
<fld>(Bot.)</fld> <def>A genus of prickly shrubs or small trees, the
bark and rots of which are of a deep yellow color; prickly
ash.</def><br/
[<source>1913 Webster</source>]</p>

<p><note><hand/ The commonest species in the Northern United States is
<spn>Xanthoxylum Americanum</spn>. See <cref>Prickly ash</cref>, under
<er>Prickly</er>.</note><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xe</ent><br/
<hw>Xe</hw> <pr>(?)</pr>, <pos>n.</pos> <def>The chemical symbol for the
chemical element <er>xenon</er>, having atomic number 54; it is one of
the six noble gases.</def><br/
<syn><b>Syn. --</b> xenon.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xebec</ent><br/
<hw>Xe"bec</hw> <pr>(z<emac/"b<ecr/k)</pr>, <pos>n.</pos> <ety>[Sp.
<ets>jabegue</ets>, formerly spelt <ets>xabeque</ets>, or Pg.
<ets>xabeco</ets>; both from Turk. <ets>sumbeki</ets> a kind of Asiatic
ship; cf. Per. <ets>sumbuk</ets>, Ar. <ets>sumb<umac/k</ets> a small
ship.]</ety> <fld>(Naut.)</fld> <def>A small three-masted vessel, with
projecting bow and stern and convex decks, used in the Mediterranean for
transporting merchandise, etc. It carries large square sails, or lateen
sails, or both. Xebecs were formerly armed and used by
corsairs.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xeme</ent><br/
<hw>Xeme</hw> <pr>(z<emac/m)</pr>, <pos>n.</pos> <fld>(Zool.)</fld>
<def>An Arctic fork-tailed gull (<spn>Xema Sabinii</spn>).</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenarthra</ent><br/
<hw>Xen*ar"thra</hw> <pos>prop. n.</pos> <def>The suborder of mammals
including the armadillos, American anteaters, and sloths.</def><br/
<syn><b>Syn. --</b> suborder <ord>Xenarthra</ord>.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xenelasia</ent><br/
\'d8<hw>Xen`e*la"si*a</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., from
Gr. <grk>xenhlasi`a</grk> expulsion of strangers.]</ety> <fld>(Gr.
Antiq.)</fld> <def>A Spartan institution which prohibited strangers from
residing in Sparta without permission, its object probably being to
preserve the national simplicity of manners.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenicidae</ent><br/
<hw>Xe*ni"ci*dae</hw> <pr>(?)</pr>, <pos>pr. n.</pos> <def>A natural
family of birds comprising the New Zealand wrens, synonymous with
<fam>Acanthisittidae</fam>.</def><br/
<syn><b>Syn. --</b> family Xenicidae, Acanthisittidae, family
Acanthisittidae.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xenicus</ent><br/
<hw>Xe"ni*cus</hw> <pr>(?)</pr>, <pos>pr. n.</pos> <def>The type genus
for the bird family <fam>Xenicidae</fam>.</def><br/
<syn><b>Syn. --</b> genus <gen>Xenicus</gen>.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xenium</ent><br/
\'d8<hw>Xe"ni*um</hw> <pr>(z<emac/"n<icr/*<ucr/m)</pr>, <pos>n.</pos>;
<plu><it>pl.</it> <plw>Xenia</plw>
<pr>(z<emac/"n<icr/*<adot/)</pr>.</plu> <ety>[L., from Gr.
<grk>xe`nion</grk> gift to a guest, fr. <grk>xe`nos</grk> guest.]</ety>
<fld>(Class. Antiq.)</fld> <def>A present given to a guest or stranger,
or to a foreign ambassador.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenodochium</ent><br/
\'d8<hw>Xen`o*do*chi"um</hw>
<pr>(z<ecr/n`<osl/*d<osl/*k<imac/"<ucr/m)</pr>, <pos>n.</pos> <ety>[LL.,
fr. L. <ets>xenodochium</ets> a building for the reception of strangers,
Gr. <grk>xenodochei^on</grk> .]</ety> <sd>(a)</sd> <fld>(Class.
Antiq.)</fld> <def>A house for the reception of strangers.</def>
<sd>(b)</sd> <def>In the Middle Ages, a room in a monastery for the
reception and entertainment of strangers and pilgrims, and for the
relief of paupers. [Called also
<altname>Xenodocheion</altname>.]</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenodochy</ent><br/
<hw>Xe*nod"o*chy</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xenodochi`a</grk>.]</ety> <def>Reception of strangers;
hospitality.</def> <mark>[R.]</mark><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenon</ent><br/
<hw>Xen"on</hw> <pr>(z<ecr/n"<ocr/n; z<emac/"n<ocr/n)</pr>,
<pos>n.</pos> <ety>[Gr. <grk>xe`non</grk>, neut. of <grk>xe`nos</grk>
strange.]</ety> <fld>(Chem.)</fld> <def>A very heavy, inert gaseous
element of the noble gas group, occurring in the atmosphere in the
proportion of one volume is about 20 millions. It was discovered by
<person>Ramsay</person> and <person>Travers</person> in 1898. It can be
condensed to a liquid boiling at -107<deg/ C., and to a solid which
melts at -111.9<deg/ C. Symbol <it>Xe</it> (formerly also <it>X</it>);
atomic number 54; atomic weight 131.3.</def><br/
[<source>Webster 1913 Suppl.</source> <source>+PJC</source>]</p>

<p><ent>Xenogamy</ent><br/
<hw>Xe*nog"a*my</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xe`nos</grk> strange, foreign + <grk>ga`mos</grk> marriage.]</ety>
<fld>(Bot.)</fld> <def>Cross fertilization.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenogenesis</ent><br/
<hw>Xen`o*gen"e*sis</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xe`nos</grk> a stranger + E. <ets>genesis</ets>.]</ety>
<fld>(Biol.)</fld> <sd>(a)</sd> <def>Same as
<er>Heterogenesis</er>.</def> <sd>(b)</sd> <def>The fancied production
of an organism of one kind by an organism of another.</def>
<rj><au>Huxley.</au></rj><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenogenetic</ent><br/
<hw>Xen`o*ge*net"ic</hw> <pr>(?)</pr>, <pos>a.</pos> <fld>(Biol.)</fld>
<def>Of or pertaining to xenogenesis; <as>as, the <ex>xenogenetic</ex>
origin of microzymes</as>.</def> <rj><au>Huxley.</au></rj><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenomania</ent><br/
<hw>Xen`o*ma"ni*a</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xe`nos</grk> strange + E. <ets>mania</ets>.]</ety> <def>A mania
for, or an inordinate attachment to, foreign customs, institutions,
manners, fashions, etc.</def> <mark>[R.]</mark>
<rj><au>Saintsbury.</au></rj><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenomi</ent><br/
\'d8<hw>Xen"o*mi</hw> <pr>(?)</pr>, <pos>prop. n. pl.</pos> <ety>[NL.,
from Gr. <grk>xe`nos</grk> strange.]</ety> <fld>(Zool.)</fld> <def>A
suborder of soft-rayed fresh-water fishes of which the blackfish of
Alaska (<spn>Dallia pectoralis</spn>) is the type.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenopterygii</ent><br/
\'d8<hw>Xe*nop`te*ryg"i*i</hw> <pr>(?)</pr>, <pos>prop. n. pl.</pos>
<ety>[NL., from Gr. <grk>xe`nos</grk> strange + <?/, dim. of <?/ a
wing.]</ety> <fld>(Zool.)</fld> <def>A suborder of fishes including
<gen>Gobiesox</gen> and allied genera. These fishes have soft-rayed
fins, and a ventral sucker supported in front by the pectoral fins. They
are destitute of scales.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenotime</ent><br/
<hw>Xen"o*time</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xeno`timos</grk> honoring guests or strangers; <grk>xe`nos</grk>
guest, stranger + <grk>timh`</grk> honor: cf. G.
<ets>xenotim</ets>.]</ety> <fld>(Min.)</fld> <def>A native phosphate of
yttrium occurring in yellowish-brown tetragonal crystals.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenurine</ent><br/
<hw>Xe*nu"rine</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xe`nos</grk> strange + <grk>o'yra`</grk> tail.]</ety>
<fld>(Zool.)</fld> <def>A cabassou.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenyl</ent><br/
<hw>Xen"yl</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr. <grk>xe`nos</grk>
strange + <ets>-yl</ets>.]</ety> <fld>(Chem.)</fld> <def>The radical
characteristic of xenylic compounds.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xenylic</ent><br/
<hw>Xe*nyl"ic</hw> <pr>(?)</pr>, <pos>a.</pos> <fld>(Chem.)</fld>
<def>Pertaining to, derived from, designating, certain amido compounds
obtained by reducing certain nitro derivatives of diphenyl.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xeraphim</ent><br/
<hw>Xer"a*phim</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Pg.
<ets>xarafin</ets>, <ets>xerafin</ets>, fr. Ar. <ets>ashraf<imac/</ets>
noble, the name of a gold coin.]</ety> <def>An old money of account in
Bombay, equal to three fifths of a rupee.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xeres</ent><br/
<hw>Xer"es</hw> <pr>(?)</pr>, <pos>n.</pos> <def>Sherry. See
<er>Sherry</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xerif</ent><br/
<hw>Xer"if</hw> <pr>(z<ecr/r"<icr/f)</pr>, <pos>n.</pos> <def>A
shereef.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xeriff</ent><br/
<hw>Xer"iff</hw> <pr>(z<ecr/r"<icr/f)</pr>, <pos>n.</pos> <ety>[See
<er>Shereef</er>.]</ety> <def>A gold coin formerly current in Egypt and
Turkey, of the value of about 9s. 6d., or about $2.30 (ca. 1900); --
also, in Morocco, a ducat.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xeroderma</ent><br/
\'d8<hw>Xe`ro*der"ma</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., fr. Gr.
<grk>xhro`s</grk> dry + <grk>de`rma</grk> skin.]</ety> <fld>(Med.)</fld>
<sd>(a)</sd> <def>Ichthyosis.</def> <sd>(b)</sd> <def>A skin disease
characterized by the presence of numerous small pigmented spots
resembling freckles, with which are subsequently mingled spots of
atrophied skin.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xeronate</ent><br/
<hw>Xe"ro*nate</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Chem.)</fld>
<def>A salt of xeronic acid.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xeronic</ent><br/
<hw>Xe*ron"ic</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[Gr.
<grk>xhro`s</grk> dry + citra<ets>conic</ets>.]</ety> <fld>(Chem.)</fld>
<def>Pertaining to, or designating, an acid, <chform>C8H12O4</chform>,
related to fumaric acid, and obtained from citraconic acid as an oily
substance having a bittersweet taste; -- so called from its tendency to
form its anhydride.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xerophagy</ent><br/
<hw>Xe*roph"a*gy</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[L.
<ets>xerophagia</ets>, Gr. <?/; <grk>xhro`s</grk> dry + <?/ to
eat.]</ety> <def>Among the primitive Christians, the living on a diet of
dry food in Lent and on other fasts.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xerophilous</ent><br/
<hw>Xe*roph"i*lous</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[Gr.
<grk>xhro`s</grk> dry + <?/ to love.]</ety> <fld>(Bot.)</fld>
<def>Drought-loving; able withstand the absence or lack of
moisture.</def><br/
[<source>1913 Webster</source>]</p>

<p><q>Plants which are peculiarly adapted to dry climates are termed by
<person>De Candolle</person> <qex>xerophilous</qex>.</q>
<rj><qau>Goodale.</qau></rj><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xerophthalmia</ent><br/
\'d8<hw>Xe`roph*thal"mi*a</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[L., fr.
Gr. <?/; <grk>xhro`s</grk> dry + <?/ the eye. See
<er>Ophthalmia</er>.]</ety> <fld>(Med.)</fld> <def>An abnormal dryness
of the eyeball produced usually by long-continued inflammation and
subsequent atrophy of the conjunctiva.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xerophthalmy</ent><br/
<hw>Xe`roph*thal"my</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Med.)</fld>
<def>Xerophthalmia.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xerophyllum</ent><br/
<hw>Xe*ro"phyl*lum</hw> <pr>(?)</pr>, <pos>pr. n.</pos> <def>A small
genus of North American herbs having grasslike basal leaves: squaw
grass; sometimes placed in family <fam>Melanthiaceae</fam>.</def><br/
<syn><b>Syn. --</b> genus <gen>Xerophyllum</gen>.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xerophyte</ent><br/
<hw>xe"ro*phyte</hw> <pr>(?)</pr>, <pos>n.</pos> <def>A plant adapted
for life with a limited supply of water; compare
<contr>hydrophyte</contr> and <contr>mesophyte</contr>.</def><br/
<syn><b>Syn. --</b> desert plant, xerophytic plant, xerophile,
xerophilous plant.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xerophytic</ent><br/
<hw>xe`ro*phy"tic</hw> <pr>(?)</pr>, <pos>adj.</pos> <sn>1.</sn>
<fld>(Botany)</fld> <ety>[Gr. <grk>xhro`s</grk> dry + <grk>fyto`n</grk>
a plant.]</ety> <def>Adapted to a xeric (or dry) environment; <as>as,
cacti are <ex>xerophytic</ex> plants; <ex>xerophytic</ex>
adaptations</as>.</def><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xerox</ent><br/
<hw>Xe"rox</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[From a brand name of
the Xerox corporation.]</ety> <def>A copying machine which copies
graphic matter by the action of light on an electrically charged
photoconductive insulating surface in which the latent image is
developed with a resinous powder.</def><br/
<syn><b>Syn. --</b> xerox, xerographic copier, xerox machine.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><sn>2.</sn> <def>A copy made by the xerox process.</def><br/
<syn><b>Syn. --</b> xerox copy.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xerox</ent><br/
<hw>xe"rox</hw> <pr>(?)</pr>, <pos>v. t.</pos> <def>To copy a printed
document on a xerographic device.</def><br/
[<source>WordNet 1.5</source>]</p> 

<p><ent>xi</ent><br/
<hw>xi</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
symbolizing the value eleven. Used after a noun it may symbolize the
ordinal number; <as>as, Superbowl <ex>XI</ex></as>.</def><br/
<syn><b>Syn. --</b> eleven, 11.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xian</ent><br/
<hw>Xi"an</hw> <pr>(?)</pr>, <pos>pr. n.</pos> <def>The capital of the
ancient Chinese empire.</def><br/
<syn><b>Syn. --</b> Sian, Singan, Changan.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xii</ent><br/
<hw>xii</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
symbolizing the value twelve; denoting a quantity consisting of 12 items
or units. Used after a noun it may symbolize the ordinal number; <as>as,
Superbowl <ex>XII</ex></as>.</def><br/
<syn><b>Syn. --</b> twelve, 12, dozen.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xiii</ent><br/
<hw>xiii</hw> <pr>(?)</pr>, <pos>adj.</pos> <sn>1.</sn> <def>the Roman
number symbolizing the value thirteen. Used after a noun it may
symbolize the ordinal number; <as>as, Superbowl
<ex>XIII</ex></as>.</def><br/
<syn><b>Syn. --</b> thirteen, 13.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xiphias</ent><br/
\'d8<hw>Xiph"i*as</hw> <pr>(?)</pr>, <pos>prop. n.</pos> <ety>[L., a
swordfish, a sword-shaped comet, fr. Gr. <grk>xifi`as</grk>, fr.
<grk>xi`fos</grk> a sword.]</ety> <sn>1.</sn> <fld>(Zool.)</fld> <def>A
genus of fishes comprising the common swordfish.</def><br/
[<source>1913 Webster</source>]</p>

<p><sn>2.</sn> <fld>(Anat.)</fld> <sd>(a)</sd> <def>The constellation
Dorado.</def> <sd>(b)</sd> <def>A comet shaped like a sword</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphidium</ent><br/
\'d8<hw>Xi*phid"i*um</hw> <pr>(?)</pr>, <pos>prop. n.</pos> <ety>[NL.,
from Gr. <?/, dim. of <grk>xi`fos</grk> sword.]</ety> <fld>(Bot.)</fld>
<def>A genus of plants of the order <ord>Haemodraceae</ord>, having
two-ranked, sword-shaped leaves.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphioid</ent><br/
<hw>Xiph"i*oid</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[<ets>Xiphius</ets>
+ <ets>-oid</ets>.]</ety> <fld>(Zool.)</fld> <def>Of, pertaining to, or
resembling, a cetacean of the genus <gen>Xiphius</gen> or family
<fam>Xiphiidae</fam>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphiplastron</ent><br/
\'d8<hw>Xiph"i*plas"tron</hw> <pr>(?)</pr>, <pos>n.</pos>;
<plu><it>pl.</it> <plw>Xiphiplastra</plw> <pr>(?)</pr>.</plu> <ety>[NL.,
fr. Gr. <grk>xi`fos</grk> a sword + <ets>plastron</ets>.]</ety>
<fld>(Anat.)</fld> <def>The posterior, or fourth, lateral plate in the
plastron of turtles; -- called also
<altname>xiphisternum</altname>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphisternum</ent><br/
\'d8<hw>Xiph"i*ster"num</hw> <pr>(?)</pr>, <pos>n.</pos>;
<plu><it>pl.</it> <plw>Xiphisterna</plw> <pr>(?)</pr>.</plu> <ety>[NL.,
fr. Gr. <grk>xi`fos</grk> a sword + <ets>sternum</ets>.]</ety>
<fld>(Anat.)</fld> <sd>(a)</sd> <def>The posterior segment, or
extremity, of the sternum; -- sometimes called
<altname>metasternum</altname>, <altname>ensiform cartilage</altname>,
<altname>ensiform process</altname>, or <altname>xiphoid
process</altname>.</def> <sd>(b)</sd> <def>The xiphiplastron.</def> --
<wordforms><wf>Xiph"i*ster"nal</wf> <pr>(?)</pr>
<pos>a.</pos></wordforms><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphius</ent><br/
\'d8<hw>Xiph"i*us</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., fr. Gr.
<grk>xi`fos</grk> a sword.]</ety> <fld>(Zool.)</fld> <def>A genus of
cetaceans having a long, pointed, bony beak, usually two tusklike teeth
in the lower jaw, but no teeth in the upper jaw.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphodon</ent><br/
<hw>Xiph"o*don</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xi`fos</grk> a sword + <grk>'odoy`s</grk>, <grk>'odo`ntos</grk>, a
tooth.]</ety> <fld>(Paleon.)</fld> <def>An extinct genus of
artiodactylous mammals found in the European Tertiary formations. It had
slender legs, didactylous feet, and small canine teeth.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphoid</ent><br/
<hw>Xiph"oid</hw> <pr>(?; 277)</pr>, <pos>a.</pos> <ety>[Gr.
<grk>xifoeidh`s</grk> sword-shaped; <grk>xi`fos</grk> a sword +
<grk>e`i^dos</grk> form, shape: cf. F. <ets>xiphoide</ets>.]</ety>
<fld>(Anat.)</fld> <sd>(a)</sd> <def>Like a sword; ensiform.</def>
<sd>(b)</sd> <def>Of or pertaining to the xiphoid process;
xiphoidian.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphoidian</ent><br/
<hw>Xiph*oid"i*an</hw> <pr>(?)</pr>, <pos>a.</pos> <fld>(Anat.)</fld>
<def>Xiphoid.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphophyllous</ent><br/
<hw>Xi*phoph"yl*lous</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[Gr.
<grk>xi`fos</grk> sword + <grk>fy`llon</grk> leaf.]</ety>
<fld>(Bot.)</fld> <def>Having sword-shaped leaves.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphosura</ent><br/
\'d8<hw>Xiph`o*su"ra</hw> <pr>(?)</pr>, <pos>n. pl.</pos> <def>See
<er>Xiphura</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xiphura</ent><br/
\'d8<hw>Xi*phu"ra</hw> <pr>(?)</pr>, <pos>n. pl.</pos> <ety>[NL., from
Gr. <grk>xi`fos</grk> sword + <grk>o'yra`</grk> tail.]</ety>
<fld>(Zool.)</fld> <def>Same as <er>Limuloidea</er>. Called also
<altname>Xiphosura</altname>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>xl</ent><br/
<hw>xl</hw> <pr>(?)</pr>, <pos>adj.</pos> <sn>1.</sn> <def>the Roman
number symbolizing the value <sig>forty</sig>.</def><br/
<syn><b>Syn. --</b> forty, 40, twoscore.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xmas</ent><br/
<hw>X"mas</hw> <pr>(?)</pr>, <pos>n.</pos> <def>Christmas; -- an
abbreviation for the Christian holiday celebrating the birth of Christ;
a quarter day in England, Wales, and Ireland.</def><br/
<syn><b>Syn. --</b> Christmas, Christmas Day, Dec 25.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>XP</ent><br/
<hw>XP</hw> <pr>(?)</pr>. <ety>[Belongs here in appearance only.]</ety>
<def>The first two letters of the Greek word <grk>CHRISTOS</grk>,
Christ; -- an abbreviation used with the letters separate or, oftener,
in a monogram, often inclosed in a circle, as a symbol or emblem of
Christ. It use as an emblem was introduced by Constantine the Great,
whence it is known as the <col><b>Constantinian symbol</b></col>, or
<col><b>monogram</b></col>. See <er>Labarum</er>.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>x-rated</ent><br/
<hw>x"-rat`ed</hw> <pr>(<ecr/ks"r<amac/t`<ecr/d)</pr>, <pos>a.</pos>
<ety>[from a system of ratings for movies based on objectionableness of
the content or suitability for children.]</ety> <def>having a rating of
X; not suitable for children; broadly, obscene or sexually
explicit.</def><br/
[<source>PJC</source>]</p>

<p><ent>X-ray</ent><br/
<ent>X ray</ent><br/
<mhw><hw>X ray</hw>, <hw>X-ray</hw></mhw> <pr>(<ecr/ks"r<amac/`)</pr>,
<pos>n.</pos> <ety>[so called by its discoverer because of its
enigmatical character, <it>x</it> being an algebraic symbol for an
unknown quantity.]</ety> <fld>(Physics)</fld> <def>Originally, any of
the rays produced when cathode rays strike upon surface of a solid (as a
copper target or the wall of the vacuum tube); now defined as
electromagnetic radiation with a wavelength of 0.1 to 10 nanometers.
X-rays are noted for their penetration of many opaque substances, as
wood and flesh, their action on photographic plates, and their
fluorescent effects. They were called <altname>X rays</altname> by their
discoverer, <person>W. K. R<oum/ntgen</person>, but were also referred
to for some time as <altname>Roentgen rays</altname>. The term
<ex>X-ray</ex> has become the most common designation. They also ionize
gases, but cannot be reflected, or polarized, or deflected by a magnetic
field. They are used in examining objects opaque to visible light, as
for imaging bones or other structures inside the human body, and for
detecting flaws in metal objects, such as in welds.</def><br/
[<source>Webster 1913 Suppl.</source> <source>+PJC</source>]</p>

<p><ent>X-ray</ent><br/
<ent>X ray</ent><br/
<mhw><hw>X ray</hw>, <hw>X-ray</hw></mhw> <pr>(<ecr/ks"r<amac/`)</pr>,
<pos>v. t.</pos> <def>To examine by means of X-rays; to irradiate with
X-rays.</def><br/
[<source>PJC</source>]</p>

<p><ent>X-ray astronomy</ent><br/
<hw>X"-ray` astronomy</hw>. <def>The branch of astronomy dealing with
the study of astronomical objects which emit X-rays, and the methods
used to detect such objects.</def><br/
[<source>PJC</source>]</p>

<p><ent>X-ray tube</ent><br/
<hw>X"-ray` tube</hw>. <fld>(Physics)</fld> <def>A vacuum tube suitable
for producing Roentgen rays.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>XT</ent><br/
<hw>XT</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Electronics)</fld> <def>An
abbreviation for <er>crosstalk</er>, the presence of an unwanted signal
via an accidental coupling.</def> <mark>[abbrev.]</mark> <br/
<syn><b>Syn. --</b> crosstalk.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xv</ent><br/
<hw>xv</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
symbolizing the value fifteen.</def><br/
<syn><b>Syn. --</b> fifteen, 15.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xvi</ent><br/
<hw>xvi</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
symbolizing the value sixteen.</def><br/
<syn><b>Syn. --</b> sixteen, 16.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xvii</ent><br/
<hw>xvii</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
symbolizing the value seventeen.</def><br/
<syn><b>Syn. --</b> seventeen, 17.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xviii</ent><br/
<hw>xviii</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
symbolizing the value eighteen.</def><br/
<syn><b>Syn. --</b> eighteen, 18.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xx</ent><br/
<hw>xx</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty</er>; denoting a quantity consisting of 20 items
or units.</def><br/
<syn><b>Syn. --</b> twenty, 20, score.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxi</ent><br/
<hw>xxi</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty-one</er>.</def><br/
<syn><b>Syn. --</b> twenty-one, 21.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxii</ent><br/
<hw>xxii</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty-two</er>.</def><br/
<syn><b>Syn. --</b> twenty-two, 22.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxiii</ent><br/
<hw>xxiii</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty-three</er>.</def><br/
<syn><b>Syn. --</b> twenty-three, 23.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxiv</ent><br/
<hw>xxiv</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty-four</er>.</def><br/
<syn><b>Syn. --</b> twenty-four, 24.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxix</ent><br/
<hw>xxix</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty-nine</er>.</def><br/
<syn><b>Syn. --</b> twenty-nine, 29.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxv</ent><br/
<hw>xxv</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty-five</er>.</def><br/
<syn><b>Syn. --</b> twenty-five, 25.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxvi</ent><br/
<hw>xxvi</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty-six</er>.</def><br/
<syn><b>Syn. --</b> twenty-six, 26.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxvii</ent><br/
<hw>xxvii</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty-seven</er>.</def><br/
<syn><b>Syn. --</b> twenty-seven, 27.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxviii</ent><br/
<hw>xxviii</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>twenty-eight</er>.</def><br/
<syn><b>Syn. --</b> twenty-eight, 28.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxx</ent><br/
<hw>xxx</hw> <pr>(?)</pr>, <pos>adj.</pos> <def>The Roman number
representing <er>thirty</er>; -- in the postposition, designating the
thirtieth in a series.</def><br/
<syn><b>Syn. --</b> thirty, 30.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>xxx</ent><br/
<hw>xxx</hw> <pr>(?)</pr>, <pos>adj.</pos> <ety>[by reduplication of the
"X" used in some movie-rating systems.]</ety> <def>Very obscene or
pornographic.</def><br/
<syn><b>Syn. --</b> X-rated, obscene, pornographic.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xylamide</ent><br/
<hw>Xy*lam"ide</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xyl</ets>ic +
<ets>amide</ets>.]</ety> <fld>(Chem.)</fld> <def>An acid amide
derivative of xylic acid, obtained as a white crystalline
substance.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylan</ent><br/
<hw>Xy"lan</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Chem.)</fld> <def>A
gummy substance of the pentosan class, present in woody tissue, and
yielding xylose on hydrolysis; wood gum.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xylanthrax</ent><br/
<hw>Xy*lan"thrax</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr.
<grk>xy`lon</grk> wood + <grk>'a`nqrax</grk> coal.]</ety> <def>Wood
coal, or charcoal; -- so called in distinction from <xex>mineral
coal</xex>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylaria</ent><br/
<hw>Xy*la"ria</hw> <pr>(?)</pr>, <pos>pr. n.</pos> <def>The type genus
of the natural family <fam>Xylariaceae</fam>; fungi with perithecia in
the upper part of erect black woody stromata.</def><br/
<syn><b>Syn. --</b> genus <gen>Xylaria</gen>.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xylariaceae</ent><br/
<hw>Xy*la'ri*a"ce*ae</hw> <pos>pr. n.</pos> <def>A natural family of
fungi characterized by dark brown to back spores.</def><br/
<syn><b>Syn. --</b> family <fam>Xylariaceae</fam>.</syn><br/
[<source>WordNet 1.5</source>]</p>

<p><ent>Xylate</ent><br/
<hw>Xy"late</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Chem.)</fld> <def>A
salt of xylic acid.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylem</ent><br/
<hw>Xy"lem</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr. <grk>xy`lon</grk>
wood.]</ety> <fld>(Bot.)</fld> <def>That portion of a fibrovascular
bundle which has developed, or will develop, into wood cells; --
distinguished from <contr>phloem</contr>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylene</ent><br/
<hw>Xy"lene</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr. <grk>xy`lon</grk>
wood.]</ety> <fld>(Chem.)</fld> <def>Any of a group of three metameric
hydrocarbons of the aromatic series, found in coal and wood tar, and so
named because found in crude wood spirit. They are colorless, oily,
inflammable liquids, <chform>C6H4.(CH3)2</chform>, being dimethyl
benzenes, and are called respectively <stype>orthoxylene</stype>,
<stype>metaxylene</stype>, and <stype>paraxylene</stype>. Called also
<altname>xylol</altname>.</def><br/
[<source>1913 Webster</source>]</p>

<p><note><hand/ Each of these xylenes is the nucleus and prototype of a
distinct series of compounds.</note><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylenol</ent><br/
<hw>Xy"le*nol</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xylene</ets> +
<ets>-ol</ets>.]</ety> <fld>(Chem.)</fld> <def>Any one of six metameric
phenol derivatives of xylene, obtained as crystalline substances,
<chform>(CH3)2.C6H3.OH</chform>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xyletic</ent><br/
<hw>Xy*let"ic</hw> <pr>(?)</pr>, <pos>a.</pos> <fld>(Chem.)</fld>
<def>Pertaining to, or designating, a complex acid related to
mesitylenic acid, obtained as a white crystalline substance by the
action of sodium and carbon dioxide on crude xylenol.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylic</ent><br/
<hw>Xy"lic</hw> <pr>(?)</pr>, <pos>a.</pos> <fld>(Chem.)</fld>
<def>Pertaining to, derived from, or related to, xylene; specifically,
designating any one of several metameric acids produced by the partial
oxidation of mesitylene and pseudo-cumene.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylidic</ent><br/
<hw>Xy*lid"ic</hw> <pr>(?)</pr>, <pos>a.</pos> <fld>(Chem.)</fld>
<def>Pertaining to, or designating, either one of two distinct acids
which are derived from xylic acid and related compounds, and are
metameric with uvitic acid.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylidine</ent><br/
<hw>Xy"li*dine</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Chem.)</fld>
<def>Any one of six metameric hydrocarbons,
<chform>(CH3)2.C6H3.NH2</chform>, resembling aniline, and related to
xylene. They are liquids, or easily fusible crystalline substances, of
which three are derived from metaxylene, two from orthoxylene, and one
from paraxylene. They are called the <xex>amido xylenes</xex>.</def><br/
[<source>1913 Webster</source>]</p>

<p><note><hand/ The xylidine of commerce, used in making certain dyes,
consists chiefly of the derivatives of paraxylene and
metaxylene.</note><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylindein</ent><br/
<hw>Xy*lin"de*in</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Chem.)</fld>
<def>A green or blue pigment produced by Peziza in certain kinds of
decayed wood, as the beech, oak, birch, etc., and extracted as an
amorphous powder resembling indigo.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylite</ent><br/
<hw>Xy"lite</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Gr. <grk>xy`lon</grk>
wood.]</ety> <fld>(Chem.)</fld> <def>A liquid hydrocarbon found in crude
wood spirits.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylitone</ent><br/
<hw>Xy"li*tone</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Chem.)</fld>
<def>A yellow oil having a geraniumlike odor, produced as a side product
in making phorone; -- called also <altname>xylite
oil</altname>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylo-</ent><br/
<hw>Xy"lo-</hw> <pr>(?)</pr>. <def>A combining form from Gr.
<grk>xy`lon</grk> wood; as in <ex>xylo</ex>gen,
<ex>xylo</ex>graph.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylobalsamum</ent><br/
\'d8<hw>Xy`lo*bal"sa*mum</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., fr.
Gr. <grk>xy`lon</grk> wood + <grk>ba`lsamon</grk> the balsam tree,
balsam; cf. L. <ets>xylobalsamum</ets> balsam wood, Gr.
<grk>xyloba`lsamon</grk>.]</ety> <fld>(Med.)</fld> <def>The dried twigs
of a Syrian tree (<spn>Balsamodendron Gileadense</spn>).</def>
<rj><au>U. S. Disp.</au></rj><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylocarpous</ent><br/
<hw>Xy`lo*car"pous</hw> <pr>(?)</pr>, <pos>a.</pos>
<ety>[<ets>Xylo-</ets> + Gr. <grk>karpo`s</grk> fruit.]</ety>
<fld>(Bot.)</fld> <def>Bearing fruit which becomes hard or
woody.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylocopa</ent><br/
\'d8<hw>Xy*loc"o*pa</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., fr. Gr.
<?/ cutting wood; <grk>xy`lon</grk> wood + <?/ to cut.]</ety>
<fld>(Zool.)</fld> <def>A genus of hymenopterous insects including the
carpenter. See <cref>Carpenter bee</cref>, under
<er>Carpenter</er>.</def> -- <wordforms><wf>Xy*loc"o*pine</wf>
<pr>(?)</pr>, <pos>a.</pos></wordforms><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylogen</ent><br/
<hw>Xy"lo*gen</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xylo-</ets> +
<ets>-gen</ets>.]</ety> <sd>(a)</sd> <fld>(Bot.)</fld> <def>Nascent
wood; wood cells in a forming state.</def> <sd>(b)</sd>
<def>Lignin.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylograph</ent><br/
<hw>Xy"lo*graph</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xylo-</ets>
+ <ets>-graph</ets>.]</ety> <def>An engraving on wood, or the impression
from such an engraving; a print by xylography.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylographer</ent><br/
<hw>Xy*log"ra*pher</hw> <pr>(?)</pr>, <pos>n.</pos> <def>One who
practices xylography.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylographical</ent><br/
<ent>Xylographic</ent><br/
<mhw>{ <hw>Xy`lo*graph"ic</hw> <pr>(?)</pr>, <hw>Xy`lo*graph"ic*al</hw>
<pr>(?)</pr>, }</mhw> <pos>a.</pos> <ety>[Cf. F.
<ets>xylographique</ets>.]</ety> <def>Of or pertaining to xylography, or
wood engraving.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylography</ent><br/
<hw>Xy*log"ra*phy</hw> <pr>(?)</pr>, <pos>n.</pos>
<ety>[<ets>Xylo-</ets> + <ets>-graphy</ets>: cf. F.
<ets>xylographie</ets>.]</ety><br/
[<source>1913 Webster</source>]</p>

<p><sn>1.</sn> <def>The art of engraving on wood.</def><br/
[<source>1913 Webster</source>]</p>

<p><sn>2.</sn> <def>The art of making prints from the natural grain of
wood.</def> <rj><au>Knight.</au></rj><br/
[<source>1913 Webster</source>]</p>

<p><sn>3.</sn> <def>A method pf printing in colors upon wood for
purposes of house decoration.</def> <rj><au>Ure.</au></rj><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xyloid</ent><br/
<hw>Xy"loid</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[<ets>Xyl</ets>o- +
<ets>-oid</ets>.]</ety> <def>Resembling wood; having the nature of
wood.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xyloidin</ent><br/
<hw>Xy*loid"in</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xyl</ets>o- +
<ets>-oid</ets>.]</ety> <fld>(Chem.)</fld> <def>A substance resembling
pyroxylin, obtained by the action of nitric acid on starch; -- called
also <altname>nitramidin</altname>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylol</ent><br/
<hw>Xy"lol</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xyl</ets>o- + L.
<ets>ol</ets>eum oil.]</ety> <fld>(Chem.)</fld> <def>Same as
<er>Xylene</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylology</ent><br/
<hw>Xy*lol"o*gy</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Pref.
<ets>xylo-</ets> + <ets>-logy</ets>.]</ety> <def>The branch of
dendrology treating of the gross and minute structure of wood.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xylonite</ent><br/
<hw>Xy"lon*ite</hw> <pr>(?)</pr>, <pos>n.</pos> <def>See
<er>Zylonite</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylophaga</ent><br/
\'d8<hw>Xy*loph"a*ga</hw> <pr>(?)</pr>, <pos>prop. n.</pos> <ety>[NL.
See <er>Xylophagous</er>.]</ety> <fld>(Zool.)</fld> <def>A genus of
marine bivalves which bore holes in wood. They are allied to
Pholas.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylophagan</ent><br/
<hw>Xy*loph"a*gan</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[See
<er>Xylophagous</er>.]</ety> <fld>(Zool.)</fld> <sd>(a)</sd> <def>One of
a tribe of beetles whose larvae bore or live in wood.</def> <sd>(b)</sd>
<def>Any species of <gen>Xylophaga</gen>.</def> <sd>(c)</sd> <def>Any
one of the <fam>Xylophagides</fam>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylophagides</ent><br/
\'d8<hw>Xy`lo*phag"i*des</hw> <pr>(?)</pr>, <pos>prop. n. pl.</pos>
<ety>[See <er>Xylophagous</er>.]</ety> <fld>(Zool.)</fld> <def>A tribe
or family of dipterous flies whose larvae live in decayed wood. Some of
the tropical species are very large.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylophagous</ent><br/
<hw>Xy*loph"a*gous</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[Gr.
<grk>xylofa`gos</grk> eating wood; <grk>xy`lon</grk> wood +
<grk>fagei^n</grk> to eat.]</ety> <fld>(Zool.)</fld> <sd>(a)</sd>
<def>Eating, boring in, or destroying, wood; -- said especially of
certain insect larvae, crustaceans, and mollusks.</def> <sd>(b)</sd>
<def>Of or pertaining to the genus <gen>Xylophaga</gen>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylophilan</ent><br/
<hw>Xy*loph"i*lan</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[See
<er>Xylophilous</er>.]</ety> <fld>(Zool.)</fld> <def>One of a tribe of
beetles (<fam>Xylophili</fam>) whose larvae live on decayed
wood.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylophilous</ent><br/
<hw>Xy*loph"i*lous</hw> <pr>(?)</pr>, <pos>a.</pos>
<ety>[<ets>Xylo-</ets> + Gr. <grk>filei^n</grk> to love.]</ety>
<fld>(Zool.)</fld> <def>Of or pertaining to the xylophilans.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylophone</ent><br/
<hw>Xy"lo*phone</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xylo-</ets>
+ Gr. <grk>fwnh`</grk> sound.]</ety><br/
[<source>1913 Webster</source>]</p>

<p><sn>1.</sn> <fld>(Mus.)</fld> <def>Originally, an instrument common
among the Russians, Poles, and Tartars, consisting of a series of strips
of wood or glass graduated in length to the musical scale, resting on
belts of straw, and struck with two small hammers; now any similar
musical instrument composed of a series of bars of graduated length.
Called in Germany <altname>strohfiedel</altname>, or <altname>straw
fiddle</altname>.</def><br/
[<source>1913 Webster</source> <source>+PJC</source>]</p>

<p><sn>2.</sn> <def>An instrument to determine the vibrative properties
of different kinds of wood.</def> <rj><au>Knight.</au></rj><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xyloplastic</ent><br/
<hw>Xy`lo*plas"tic</hw> <pr>(?)</pr>, <pos>a.</pos>
<ety>[<ets>Xylo-</ets> + <ets>-plastic</ets>.]</ety>
<fld>(Technol.)</fld> <def>Formed of wood pulp by molds; relating to
casts made of wood pulp in molds.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylopyrography</ent><br/
<hw>Xy`lo*py*rog"ra*phy</hw> <pr>(?)</pr>. <pos>n.</pos>
<ety>[<ets>Xylo-</ets> + Gr. <?/, <?/, fire + <ets>-graphy</ets>.]</ety>
<def>The art or practice of burning pictures on wood with a hot iron; --
called also <altname>wood burning</altname> and <altname>poker
painting</altname>. See <cref>Poker picture</cref>, under
<er>Poker</er>.</def><br/
[<source>1913 Webster</source> + <source>PJC</source>]</p>

<p><-- p. 1672 --><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xyloquinone</ent><br/
<hw>Xy`lo*qui"none</hw> <pr>(?)</pr>, <pos>n.</pos>
<ety>[<ets>Xyl</ets>ene + <ets>quinone</ets>.]</ety> <fld>(Chem.)</fld>
<def>Any one of a group of quinone compounds obtained respectively by
the oxidation of certain xylidine compounds. In general they are yellow
crystalline substances.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylorcin</ent><br/
<hw>Xy*lor"cin</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xyl</ets>ene
+ <ets>orcin</ets>.]</ety> <fld>(Chem.)</fld> <def>A derivative of
xylene obtained as a white crystalline substance which on exposure in
the air becomes red; -- called also
<altname>betaorcin</altname>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylose</ent><br/
<hw>Xy"lose</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Pref.
<ets>xylo-</ets> + <ets>-ose</ets>.]</ety> <fld>(Chem.)</fld> <def>An
unfermentable sugar of the pentose class, <chform>C5H10O5</chform>,
formed by the hydrolysis of xylan; wood sugar.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xylostein</ent><br/
<hw>Xy*los"te*in</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xylo-</ets>
+ Gr. <grk>'oste`on</grk> bone.]</ety> <fld>(Chem.)</fld> <def>A
glucoside found in the poisonous berries of a species of honeysuckle
(<spn>Lonicera xylosteum</spn>), and extracted as a bitter, white,
crystalline substance.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylotile</ent><br/
<hw>Xy"lo*tile</hw> <pr>(?)</pr>, <pos>n.</pos> <def>Same as
<er>Parkesine</er>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylotomist</ent><br/
<hw>Xy*lot"o*mist</hw> <pr>(?)</pr>, <pos>n.</pos> <def>One versed or
engaged in xylotomy.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xylotomous</ent><br/
<hw>Xy*lot"o*mous</hw> <pr>(?)</pr>, <pos>a.</pos> <ety>[Pref.
<ets>xylo-</ets> + root of Gr. <grk>te`mnein</grk> to cut.]</ety>
<fld>(Zool.)</fld> <def>Capable of boring or cutting wood; -- said of
many insects.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xylotomy</ent><br/
<hw>Xy*lot"o*my</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[Pref.
<ets>xylo-</ets> + <ets>-tomy</ets>.]</ety> <def>Art of preparing
sections (transverse, tangential, or radial) of wood, esp. by means of a
microtome, for microscopic examination.</def><br/
[<source>Webster 1913 Suppl.</source>]</p>

<p><ent>Xylotrya</ent><br/
\'d8<hw>Xy*lo"try*a</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., fr. Gr.
<grk>xy`lon</grk> wood + <?/ to rub, wear out.]</ety> <fld>(Zool.)</fld>
<def>A genus of marine bivalves closely allied to Teredo, and equally
destructive to timber. One species (<spn>Xylotrya fimbriata</spn>) is
very common on the Atlantic coast of the United States.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylyl</ent><br/
<hw>Xy"lyl</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[<ets>Xylo-</ets> +
<ets>-yl</ets>.]</ety> <fld>(Chem.)</fld> <def>Any one of three
metameric radicals which are characteristic respectively of the three
xylenes.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xylylene</ent><br/
<hw>Xy"lyl*ene</hw> <pr>(?)</pr>, <pos>n.</pos> <fld>(Chem.)</fld>
<def>Any one of three metameric radicals, <chform>CH2.C6H4.CH2</chform>,
derived respectively from the three xylenes. Often used adjectively;
<as>as, <ex>xylylene</ex> alcohol</as>.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xyridaceous</ent><br/
<hw>Xyr`i*da"ceous</hw> <pr>(?)</pr>, <pos>a.</pos> <fld>(Bot.)</fld>
<def>Of or pertaining to a natural order (<ord>Xyrideae</ord>) of
endogenous plants, of which <gen>Xyris</gen> is the type.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xyris</ent><br/
\'d8<hw>Xy"ris</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[L., a kind of
Iris, Gr. <?/, fr. <?/ a razor.]</ety> <fld>(Bot.)</fld> <def>A genus of
endogenous herbs with grassy leaves and small yellow flowers in short,
scaly-bracted spikes; yellow-eyed grass. There are about seventeen
species in the Atlantic United States.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xystus</ent><br/
<ent>Xyst</ent><br/
<mhw>{ <hw>Xyst</hw> <pr>(?)</pr>, \'d8<hw>Xys"tus</hw> <pr>(?)</pr>,
}</mhw> <pos>n.</pos> <ety>[L. <ets>xystus</ets>, Gr. <?/, from <?/ to
scrape, polish; -- so called from its smooth and polished floor.]</ety>
<fld>(Anc. Arch.)</fld> <def>A long and open portico, for athletic
exercises, as wrestling, running, etc., for use in winter or in stormy
weather.</def><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xystarch</ent><br/
<hw>Xyst"arch</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[L.
<ets>xystarches</ets>, Gr. <?/, <?/ a xyst + <?/ to rule.]</ety>
<fld>(Gr. Antiq.)</fld> <def>An officer having the superintendence of
the xyst.</def> <rj><au>Dr. W. Smith.</au></rj><br/
[<source>1913 Webster</source>]</p>

<p><ent>Xyster</ent><br/
<hw>Xys"ter</hw> <pr>(?)</pr>, <pos>n.</pos> <ety>[NL., fr. Gr.
<grk>xysth`r</grk> a scraper.]</ety> <fld>(Surg.)</fld> <def>An
instrument for scraping bones.</def><br/
[<source>1913 Webster</source>]</p>


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