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Helenin :: Helenin (n.) A neutral organic substance found in the root of the elecampane (Inula helenium), and extracted as a white crystalline or oily material, with a slightly bitter taste..

Pyrophosphoric :: Pyrophosphoric (a.) Pertaining to, or designating, an acid, H4P2O7, which is obtained as a white crystalline substance. Its salts are obtained by heating the phosphates..

Sinamine :: Sinamine (n.) A bitter white crystalline nitrogenous substance, obtained indirectly from oil of mustard and ammonia; -- called also allyl melamine..

Kairine :: Kairine (n.) A pale buff or white crystalline alkaloid derived from quinoline, and used as an antipyretic in medicine..

Salicylide :: Salicylide (n.) A white crystalline substance obtained by dehydration of salicylic acid.

Trigenic :: Trigenic (a.) Of, pertaining to, or designating, an acid, C4H7N3O2, obtained, by the action of the vapor of cyanic acid on cold aldehyde, as a white crystalline substance having a slightly acid taste and faint smell; -- called also ethidene- / ethylidene-biuret..

Quinone :: Quinone (n.) A crystalline substance, C6H4O2 (called also benzoketone), first obtained by the oxidation of quinic acid and regarded as a double ketone; also, by extension, any one of the series of which quinone proper is the type..

Inulin :: Inulin (n.) A substance of very wide occurrence. It is found dissolved in the sap of the roots and rhizomes of many composite and other plants, as Inula, Helianthus, Campanula, etc., and is extracted by solution as a tasteless, white, semicrystalline substance, resembling starch, with which it is isomeric. It is intermediate in nature between starch and sugar. Called also dahlin, helenin, alantin, etc..

Suberin :: Suberic (a.) Of or pertaining to cork; specifically, designating an acid, C6H12.(CO2H)2, homologous with oxalic acid, and obtained from cork and certain fatty oils, as a white crystalline substance..

Nataloin :: Nataloin (n.) A bitter crystalline substance constituting the essential principle of Natal aloes. Cf. Aloon.

Convallarin :: Convallarin (n.) A white, crystalline glucoside, of an irritating taste, extracted from the convallaria or lily of the valley..

Ecgonine :: Ecgonine (n.) A colorless, crystalline, nitrogenous base, obtained by the decomposition of cocaine..

Crystalline :: Crystalline (n.) See Aniline.

Urethane :: Urethane (n.) A white crystalline substance, NH2.CO.OC2H5, produced by the action of ammonia on ethyl carbonate. It is used somewhat in medicine as a hypnotic. By extension, any one of the series of related substances of which urethane proper is the type..

Gypsum :: Gypsum (n.) A mineral consisting of the hydrous sulphate of lime (calcium). When calcined, it forms plaster of Paris. Selenite is a transparent, crystalline variety; alabaster, a fine, white, massive variety..

Glyoxime :: Glyoxime (n.) A white, crystalline, nitrogenous substance, produced by the action of hydroxylamine on glyoxal, and belonging to the class of oximes; also, any one of a group of substances resembling glyoxime proper, and of which it is a type. See Oxime..

Glauber''s Salts :: Glauber's salts () Sulphate of soda, a well-known cathartic. It is a white crystalline substance, with a cooling, slightly bitter taste, and is commonly called salts..

Metaphosphoric :: Metaphosphoric (a.) Pertaining to, or designating, a monobasic acid, HPO3, analogous to nitric acid, and, by heating phosphoric acid, obtained as a crystalline substance, commonly called glacial phosphoric acid..

Cystine :: Cystine (n.) A white crystalline substance, C3H7NSO2, containing sulphur, occuring as a constituent of certain rare urinary calculi, and occasionally found as a sediment in urine..

Chrysene :: Chrysene (n.) One of the higher aromatic hydrocarbons of coal tar, allied to naphthalene and anthracene. It is a white crystalline substance, C18H12, of strong blue fluorescence, but generally colored yellow by impurities..

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