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Wyla

A helmeted Australian cockatoo (Calyptorhynchus funereus); -- called also funeral cockatoo.

Wynd

A narrow lane or alley.

Wynn

A kind of timber truck, or carriage.

Wype

The wipe, or lapwing.

Wythe

Same as Withe, n., 4.

x-rated

having a rating of X; not suitable for children; broadly, obscene or sexually explicit.

X-ray X ray

To examine by means of X-rays; to irradiate with X-rays.

Xanthamide

An amido derivative of xanthic acid obtained as a white crystalline substance, C2H5O.CS.NH2; -- called also xanthogen amide.

Xanthate

A salt of xanthic; a xanthogenate.

Xanthian

Of or pertaining to Xanthus, an ancient town on Asia Minor; -- applied especially to certain marbles found near that place, and now in the British Museum.

Xanthide

A compound or derivative of xanthogen.

Xanthidium

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.

Xanthin Xanthine

A type of purine obtainable as a white microcrystalline powder, C5H4O2N4, 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.

Xanthinine

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.

Xanthium

A genus of composite plants in which the scales of the involucre are united so as to form a kind of bur; cocklebur; clotbur.

Xanthochroi

A division of the Caucasian races, comprising the lighter-colored members.

Xanthochroic

Having a yellowish or fair complexion; of or pertaining to the Xanthochroi.

Xanthochroid

Having a yellowish or fair complexion. A person having xanthochroid traits.

Xanthochroism

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.

Xanthogen

The hypothetical radical supposed to be characteristic of xanthic acid. Persulphocyanogen.

Xanthogenic

Producing a yellow color or compound; xanthic. See Xanthic acid, under Xanthic.

Xanthoma

A skin disease marked by the development or irregular yellowish patches upon the skin, especially upon the eyelids; -- called also xanthelasma.

Xanthomelanous

Of or pertaining to the lighter division of the Melanochroi, or those races having an olive or yellow complexion and black hair.

Xanthophane

The yellow pigment present in the inner segments of the retina in animals. See Chromophane.

Xanthophyll

A yellow coloring matter found in yellow autumn leaves, and also produced artificially from chlorophyll; -- formerly called also phylloxanthin.

Xanthoproteic

Pertaining to, or derived from, xanthoprotein; showing the characters of xanthoprotein; as, xanthoproteic acid; the xanthoproteic reaction for albumin.

Xanthoprotein

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.

Xanthopuccine

One of three alkaloids found in the root of the yellow puccoon (Hydrastis Canadensis). It is a yellow crystalline substance, and resembles berberine.

Xanthorhamnin

A glucoside extracted from Persian berries as a yellow crystalline powder, used as a dyestuff.

Xanthorhiza

A genus of shrubby ranunculaceous plants of North America, including only the species Xanthorhiza apiifolia, which has roots of a deep yellow color; yellowroot. The bark is intensely bitter, and is sometimes used as a tonic.

Xanthorhoea

A genus of endogenous plants, native to Australia, having a thick, sometimes arborescent, stem, and long grasslike leaves. See Grass tree.

Xanthose

An orange-yellow substance found in pigment spots of certain crabs.

Xanthosis

The yellow discoloration often observed in cancerous tumors.

Xanthous

Yellow; specifically (Ethnol.), of or pertaining to those races of man which have yellowish, red, auburn, or brown hair.

Xanthoxylene

A liquid hydrocarbon of the terpene series extracted from the seeds of a Japanese prickly ash (Xanthoxylum pipertium) as an aromatic oil.

Xanthoxylum

A genus of prickly shrubs or small trees, the bark and rots of which are of a deep yellow color; prickly ash.

Xe

The chemical symbol for the chemical element xenon, having atomic number 54; it is one of the six noble gases.

Xebec

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.

Xeme

An Arctic fork-tailed gull (Xema Sabinii).

Xenarthra

The suborder of mammals including the armadillos, American anteaters, and sloths.

Xenelasia

A Spartan institution which prohibited strangers from residing in Sparta without permission, its object probably being to preserve the national simplicity of manners.

Xenicidae

A natural family of birds comprising the New Zealand wrens, synonymous with Acanthisittidae.

Xenicus

The type genus for the bird family Xenicidae.

Xenium

A present given to a guest or stranger, or to a foreign ambassador.

Xenodochium

A house for the reception of strangers. 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 Xenodocheion.]

Xenodochy

Reception of strangers; hospitality.

Xenogenesis

Same as Heterogenesis. The fancied production of an organism of one kind by an organism of another.

Xenogenetic

Of or pertaining to xenogenesis; as, the xenogenetic origin of microzymes.

Xenomania

A mania for, or an inordinate attachment to, foreign customs, institutions, manners, fashions, etc.

Xenomi

A suborder of soft-rayed fresh-water fishes of which the blackfish of Alaska (Dallia pectoralis) is the type.

Xenon

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 Ramsay and Travers in 1898. It can be condensed to a liquid boiling at -107/ C., and to a solid which melts at -111.9/ C. Symbol Xe (formerly also X); atomic number 54; atomic weight 131.3.

Xenopterygii

A suborder of fishes including Gobiesox 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.

Xenotime

A native phosphate of yttrium occurring in yellowish-brown tetragonal crystals.

Xenyl

The radical characteristic of xenylic compounds.

Xenylic

Pertaining to, derived from, designating, certain amido compounds obtained by reducing certain nitro derivatives of diphenyl.

Xeraphim

An old money of account in Bombay, equal to three fifths of a rupee.

Xeriff

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.

Xeroderma

Ichthyosis. A skin disease characterized by the presence of numerous small pigmented spots resembling freckles, with which are subsequently mingled spots of atrophied skin.

Xeronic

Pertaining to, or designating, an acid, C8H12O4, 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.

Xerophagy

Among the primitive Christians, the living on a diet of dry food in Lent and on other fasts.

Xerophilous

Drought-loving; able withstand the absence or lack of moisture.

Xerophthalmia

An abnormal dryness of the eyeball produced usually by long-continued inflammation and subsequent atrophy of the conjunctiva.

Xerophyllum

A small genus of North American herbs having grasslike basal leaves: squaw grass; sometimes placed in family Melanthiaceae.

xerophyte

A plant adapted for life with a limited supply of water; compare hydrophyte and mesophyte.

xerophytic

Adapted to a xeric (or dry) environment; as, cacti are xerophytic plants; xerophytic adaptations.

Xerox

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.

xerox

To copy a printed document on a xerographic device.

xi

The Roman number symbolizing the value eleven. Used after a noun it may symbolize the ordinal number; as, Superbowl XI.

Xian

The capital of the ancient Chinese empire.

xii

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, Superbowl XII.

xiii

the Roman number symbolizing the value thirteen. Used after a noun it may symbolize the ordinal number; as, Superbowl XIII.

Xiphias

A genus of fishes comprising the common swordfish.

Xiphidium

A genus of plants of the order Haemodraceae, having two-ranked, sword-shaped leaves.

Xiphioid

Of, pertaining to, or resembling, a cetacean of the genus Xiphius or family Xiphiidae.

Xiphiplastron

The posterior, or fourth, lateral plate in the plastron of turtles; -- called also xiphisternum.

Xiphisternum

The posterior segment, or extremity, of the sternum; -- sometimes called metasternum, ensiform cartilage, ensiform process, or xiphoid process. The xiphiplastron.

Xiphius

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.

Xiphodon

An extinct genus of artiodactylous mammals found in the European Tertiary formations. It had slender legs, didactylous feet, and small canine teeth.

Xiphoid

Like a sword; ensiform. Of or pertaining to the xiphoid process; xiphoidian.

Xiphura

Same as Limuloidea. Called also Xiphosura.

xl

the Roman number symbolizing the value forty.

Xmas

Christmas; -- an abbreviation for the Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland.

XT

An abbreviation for crosstalk, the presence of an unwanted signal via an accidental coupling.

xv

The Roman number symbolizing the value fifteen.

xvi

The Roman number symbolizing the value sixteen.

xvii

The Roman number symbolizing the value seventeen.

xviii

The Roman number symbolizing the value eighteen.

xx

The Roman number representing twenty; denoting a quantity consisting of 20 items or units.

xxi

The Roman number representing twenty-one.

xxii

The Roman number representing twenty-two.

xxiii

The Roman number representing twenty-three.

xxiv

The Roman number representing twenty-four.

xxix

The Roman number representing twenty-nine.

xxv

The Roman number representing twenty-five.

xxvi

The Roman number representing twenty-six.

xxvii

The Roman number representing twenty-seven.

xxviii

The Roman number representing twenty-eight.

xxx

Very obscene or pornographic.

Xylamide

An acid amide derivative of xylic acid, obtained as a white crystalline substance.

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