English Dictionary
There are currently 142 EnglishDictionary in this directory beginning with the letter X.
X
Xanthamide (n.) An amido derivative of xanthic acid obtained as a white crystalline substance, C2H5O.CS.NH2; -- called also xanthogen amide.
Xanthian (a.) 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.
Xanthic (a.) Tending toward a yellow color, or to one of those colors, green being excepted, in which yellow is a constituent, as scarlet, orange, etc.
Xanthidium (n.) 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 (n.) A yellow insoluble coloring matter extracted from yellow flowers; specifically, the coloring matter of madder.
Xanthin (n.) One of the gaseous or volatile decomposition products of the xanthates, and probably identical with carbon disulphide.
Xanthinine (n.) 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 (n.) A genus of composite plants in which the scales of the involucre are united so as to form a kind of bur; cocklebur; clotbur.
Xantho- () A combining form from Gr. xanqo`s yellow; as in xanthocobaltic salts. Used also adjectively in chemistry.
Xanthoma (n.) A skin disease marked by the development or irregular yellowish patches upon the skin, especially upon the eyelids; -- called also xanthelasma.
Xanthophane (n.) The yellow pigment present in the inner segments of the retina in animals. See Chromophane.
Xanthophyll (n.) A yellow coloring matter found in yellow autumn leaves, and also produced artificially from chlorophyll; -- formerly called also phylloxanthin.
Xanthoproteic (a.) Pertaining to, or derived from, xanthoprotein; showing the characters of xanthoprotein; as, xanthoproteic acid; the xanthoproteic reaction for albumin.
Xanthoprotein (n.) 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 (n.) One of three alkaloids found in the root of the yellow puccoon (Hydrastis Canadensis). It is a yellow crystalline substance, and resembles berberine.
Xanthorhamnin (n.) A glucoside extracted from Persian berries as a yellow crystalline powder, used as a dyestuff.
Xanthorhiza (n.) 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 (n.) A genus of endogenous plants, native to Australia, having a thick, sometimes arborescent, stem, and long grasslike leaves. See Grass tree.
Xanthous (a.) Yellow; specifically (Ethnol.), of or pertaining to those races of man which have yellowish, red, auburn, or brown hair.
Xanthoxylene (n.) A liquid hydrocarbon of the terpene series extracted from the seeds of a Japanese prickly ash (Xanthoxylum pipertium) as an aromatic oil.
Xanthoxylum (n.) A genus of prickly shrubs or small trees, the bark and rots of which are of a deep yellow color; prickly ash.
Xebec (n.) A small three-masted vessel, with projecting bow stern and convex decks, used in the Mediterranean for transporting merchandise, etc. It carries large square sails, or both. Xebecs were formerly armed and used by corsairs.
Xenelasia (n.) A Spartan institution which prohibited strangers from residing in Sparta without permission, its object probably being to preserve the national simplicity of manners.
Xenodochium (n.) 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.]
Xenomania (n.) A mania for, or an inordinate attachment to, foreign customs, institutions, manners, fashions, etc.
Xenomi (n. pl.) A suborder of soft-rayed fresh-water fishes of which the blackfish of Alaska (Dallia pectoralis) is the type.
Xenopterygii (n. pl.) 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.
Xenylic (a.) Pertaining to, derived from, designating, certain amido compounds obtained by reducing certain nitro derivatives of diphenyl.
Xeriff (n.) A gold coin formerly current in Egypt and Turkey, of the value of about 9s. 6d., or about $2.30; -- also, in Morocco, a ducat.
Xeroderma (n.) A skin disease characterized by the presence of numerous small pigmented spots resembling freckles, with which are subsequently mingled spots of atrophied skin.
Xeronic (a.) 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 (n.) Among the primitive Christians, the living on a diet of dry food in Lent and on other fasts.
Xerophthalmia (n.) An abnormal dryness of the eyeball produced usually by long-continued inflammation and subsequent atrophy of the conjunctiva.
Xiphioid (a.) Of, pertaining to, or resembling, a cetacean of the genus Xiphius or family Xiphiidae.
Xiphiplastron (n.) The posterior, or fourth, lateral plate in the plastron of turtles; -- called also xiphisternum.
Xiphisternum (n.) The posterior segment, or extremity, of the sternum; -- sometimes called metasternum, ensiform cartilage, ensiform process, or xiphoid process.
Xiphius (n.) 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 (n.) An extinct genus of artiodactylous mammals found in the European Tertiary formations. It had slender legs, didactylous feet, and small canine teeth.
Xylem (n.) That portion of a fibrovascular bundle which has developed, or will develop, into wood cells; -- distinguished from phloem.
Xylenol (n.) Any one of six metameric phenol derivatives of xylene, obtained as crystalline substances, (CH3)2.C6H3.OH.
Xyletic (a.) 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.
Xylic (a.) 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.
Xylidic (a.) 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.
Xylindein (n.) 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.
Xylitone (n.) A yellow oil having a geraniumlike odor, produced as a side product in making phorone; -- called also xylite oil.
Xylocopa (n.) A genus of hymenopterous insects including the carpenter. See Carpenter bee, under Carpenter.
Xylograph (n.) An engraving on wood, or the impression from such an engraving; a print by xylography.
Xyloidin (n.) A substance resembling pyroxylin, obtained by the action of nitric acid on starch; -- called also nitramidin.
Xylophagides (n. pl.) A tribe or family of dipterous flies whose larvae live in decayed wood. Some of the tropical species are very large.
Xylophagous (a.) Eating, boring in, or destroying, wood; -- said especially of certain insect larvae, crustaceans, and mollusks.
Xylopyrography (n.) The art or practice of burning pictures on wood with a hot iron; -- called also poker painting. See Poker picture, under Poker.
Xyloquinone (n.) Any one of a group of quinone compounds obtained respectively by the oxidation of certain xylidine compounds. In general they are yellow crystalline substances.
Xylorcin (n.) A derivative of xylene obtained as a white crystalline substance which on exposure in the air becomes red; -- called also betaorcin.
Xylostein (n.) A glucoside found in the poisonous berries of a species of honeysuckle (Lonicera xylosteum), and extracted as a bitter, white, crystalline substance.
Xylotrya (n.) A genus of marine bivalves closely allied to Teredo, and equally destructive to timber. One species (Xylotrya fimbriata) is very common on the Atlantic coast of the United States.
Xylyl (n.) Any one of three metameric radicals which are characteristic respectively of the three xylenes.
Xylylene (n.) Any one of three metameric radicals, CH2.C6H4.CH2, derived respectively from the three xylenes. Often used adjectively; as, xylylene alcohol.
Xyridaceous (a.) Of or pertaining to a natural order (Xyrideae) of endogenous plants, of which Xyris is the type.
Xyris (n.) 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.
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