| X: | X the twentyfourth letter of the English alphabet has three sounds a compound nonvocal sound that of ks as in wax a compound vocal sound that of gz as in example and at the beginning of a word a simple vocal sound that of z as in xanthic See Guide to Pronunciation sectsect 217 270 271 |
| Xanthamide: | An amido derivative of xanthic acid obtained as a white crystalline substance C2H5OCSNH2 called also xanthogen amide |
| Xanthate: | A salt of xanthic a xanthogenate |
| dXanthelasma: | See Xanthoma |
| 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 |
| dXanthidium: | A genus of minute unicellular alg of the desmids These alg 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: | same as xanthine |
| 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 |
| dXanthium: | 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 xanqos yellow as in xanthocobaltic salts Used also adjectively in chemistry |
| Xanthocarpous: | Having yellow fruit |
| dXanthochroi: | A division of the Caucasian races comprising the lightercolored members |
| Xanthochroic: | Having a yellowish or fair complexion of or pertaining to the Xanthochroi |
| Xanthochroid: | Having a yellowish or fair complexion |
| 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 |
| Xanthodontous: | Having yellow teeth |
| Xanthogen: | The hypothetical radical supposed to be characteristic of xanthic acid |
| Xanthogenate: | A salt of xanthic acid |
| Xanthogenic: | Producing a yellow color or compound xanthic See Xanthic acid under Xanthic |
| dXanthoma: | A skin disease marked by the development or irregular yellowish patches upon the skin especially upon the eyelids called also xanthelasma |
| Xanthomatous: | Of or pertaining to xanthoma |
| 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 |
| Xanthopous: | Having a yellow stipe or stem |
| 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 orangeyellow 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 |
| dXanthorhda: | A genus of endogenous plants native to Australia having a thick sometimes arborescent stem and long grasslike leaves See Grass tree |
| Xanthose: | An orangeyellow substance found in pigment spots of certain crabs |
| dXanthosis: | The yellow discoloration often observed in cancerous tumors |
| Xanthospermous: | Having yellow seeds |
| 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 |
| dXanthoxylum: | A genus of prickly shrubs or small trees the bark and rots of which are of a deep yellow color prickly ash |
| Xebec: | A small threemasted 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 |
| Xeme: | An Arctic forktailed gull Xema Sabinii |
| dXenelasia: | A Spartan institution which prohibited strangers from residing in Sparta without permission its object probably being to preserve the national simplicity of manners |
| dXenium: | A present given to a guest or stranger or to a foreign ambassador |
| dXenodochium: | A house for the reception of strangers |
| Xenodochy: | Reception of strangers hospitality |
| 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 107f8 C and to a solid which melts at 1119f8 C Symbol Xe formely also X atomic number 54 atomic weight 1313 |
| Xenogamy: | Cross fertilization |
| Xenogenesis: | Same as Heterogenesis |
| 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 |
| dXenomi: | A suborder of softrayed freshwater fishes of which the blackfish of Alaska Dallia pectoralis is the type |
| dXenopterygii: | A suborder of fishes including Gobiesox and allied genera These fishes have softrayed 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 yellowishbrown tetragonal crystals |
| Xenurine: | A cabassou |
| 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 |
| Xeres: | Sherry See Sherry |
| Xerif: | A shereef |
| Xeriff: | A gold coin formerly current in Egypt and Turkey of the value of about 9s 6d or about 230 also in Morocco a ducat |
| dXeroderma: | Ichthyosis |
| Xeronate: | A salt of xeronic acid |
| 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: | Droughtloving able withstand the absence or lack of moisture |
| dXerophthalmia: | An abnormal dryness of the eyeball produced usually by longcontinued inflammation and subsequent atrophy of the conjunctiva |
| Xerophthalmy: | Xerophthalmia |
| dXiphidium: | A genus of plants of the order Hmodrace having tworanked swordshaped leaves |
| Xiphioid: | Of pertaining to or resembling a cetacean of the genus Xiphius or family Xiphiid |
| dXiphiplastron: | The posterior or fourth lateral plate in the plastron of turtles called also xiphisternum |
| dXiphisternum: | The posterior segment or extremity of the sternum sometimes called metasternum ensiform cartilage ensiform process or xiphoid process |
| dXiphius: | 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 |
| Xiphoidian: | Xiphoid |
| Xiphophyllous: | Having swordshaped leaves |
| dXiphosura: | See Xiphura |
| dXiphura: | Same as Limuloidea Called also Xiphosura |
| XP: | The first two letters of the Greek word XRISTOS 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 Constantinian symbol or monogram See Labarum |
| xrated: | having a rating of X not suitable for children broadly obscene or sexually explicit |
| Xray: | 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 01 to 10 nanometers Xrays 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 X rays by their discoverer W K R94ntgen but were also referred to for some time as Roentgen rays The term Xray 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 |
| Xray: | to examine by means of Xrays to irradiate with Xrays |
| Xrayastronomy: | the branch of astronomy dealing with the study of astronomical objects which emit Xrays and the methods used to detect such objects |
| Xraytube: | A vacuum tube suitable for producing R94ntgen rays |
| Xylamide: | An acid amide derivative of xylic acid obtained as a white crystalline substance |
| Xylan: | A gummy substance of the pentosan class present in woody tissue and yielding xylose on hydrolysis wood gum |
| Xylanthrax: | Wood coal or charcoal so called in distinction from mineral coal |
| Xylate: | A salt of xylic acid |
| Xylem: | That portion of a fibrovascular bundle which has developed or will develop into wood cells distinguished from phlo89m |
| Xylene: | 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 C6H4CH32 being dimethyl benzenes and are called respectively orthoxylene metaxylene and paraxylene Called also xylol |
| Xylenol: | Any one of six metameric phenol derivatives of xylene obtained as crystalline substances CH32C6H3OH |
| Xyletic: | 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: | Pertaining to derived from or related to xylene specifically designating any one of several metameric acids produced by the partial oxidation of mesitylene and pseudocumene |
| Xylidic: | 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 |
| Xylidine: | Any one of six metameric hydrocarbons CH32C6H3NH2 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 amido xylenes |
| Xylindein: | 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 |
| Xylite: | A liquid hydrocarbon found in crude wood spirits |
| Xylitone: | A yellow oil having a geraniumlike odor produced as a side product in making phorone called also xylite oil |
| Xylo: | A combining form from Gr xylon wood as in xylogen xylograph |
| dXylobalsamum: | The dried twigs of a Syrian tree Balsamodendron Gileadense |
| Xylocarpous: | Bearing fruit which becomes hard or woody |
| dXylocopa: | A genus of hymenopterous insects including the carpenter See Carpenter bee under Carpenter |
| Xylogen: | Nascent wood wood cells in a forming state |
| Xylograph: | An engraving on wood or the impression from such an engraving a print by xylography |
| Xylographer: | One who practices xylography |
| Xylographic: | Of or pertaining to xylography or wood engraving |
| Xyloid: | Resembling wood having the nature of wood |
| Xyloidin: | A substance resembling pyroxylin obtained by the action of nitric acid on starch called also nitramidin |
| Xylol: | Same as Xylene |
| Xylology: | The branch of dendrology treating of the gross and minute structure of wood |
| Xylonite: | See Zylonite |
| dXylophaga: | A genus of marine bivalves which bore holes in wood They are allied to Pholas |
| Xylophagan: | One of a tribe of beetles whose larv bore or live in wood |
| dXylophagides: | A tribe or family of dipterous flies whose larv live in decayed wood Some of the tropical species are very large |
| Xylophagous: | Eating boring in or destroying wood said especially of certain insect larv crustaceans and mollusks |
| Xylophilan: | One of a tribe of beetles Xylophili whose larv live on decayed wood |
| Xylophilous: | Of or pertaining to the xylophilans |
| Xyloplastic: | Formed of wood pulp by molds relating to casts made of wood pulp in molds |
| Xylopyrography: | The art or practice of burning pictures on wood with a hot iron called also poker painting See Poker picture under Poker |
| Xyloquinone: | 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: | A derivative of xylene obtained as a white crystalline substance which on exposure in the air becomes red called also betaorcin |
| Xylose: | An unfermentable sugar of the pentose class C5H10O5 formed by the hydrolysis of xylan wood sugar |
| Xylostein: | A glucoside found in the poisonous berries of a species of honeysuckle Lonicera xylosteum and extracted as a bitter white crystalline substance |
| Xylotile: | Same as Parkesine |
| Xylotomist: | One versed or engaged in xylotomy |
| Xylotomous: | Capable of boring or cutting wood said of many insects |
| Xylotomy: | Art of preparing sections transverse tangential or radial of wood esp by means of a microtome for microscopic examination |
| dXylotrya: | 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: | Any one of three metameric radicals which are characteristic respectively of the three xylenes |
| Xylylene: | Any one of three metameric radicals CH2C6H4CH2 derived respectively from the three xylenes Often used adjectively as xylylene alcohol |
| Xyridaceous: | Of or pertaining to a natural order Xyride of endogenous plants of which Xyris is the type |
| dXyris: | A genus of endogenous herbs with grassy leaves and small yellow flowers in short scalybracted spikes yelloweyed grass There are about seventeen species in the Atlantic United States |
| Xyst: | A long and open portico for athletic exercises as wrestling running etc for use in winter or in stormy weather |
| Xystarch: | An office having the superintendence of the xyst |
| Xyster: | An instrument for scraping bones |
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