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Itaconic :: Itaconic (a.) Pertaining to, or designating, an acid, C5H6O4, which is obtained as a white crystalline substance by decomposing aconitic and other organic acids..

Parillin :: Parillin (n.) A glucoside resembling saponin, found in the root of sarsaparilla, smilax, etc., and extracted as a bitter white crystalline substance; -- called also smilacin, sarsaparilla saponin, and sarsaparillin..

Santalic :: Santalic (a.) Of, pertaining to, or obtained from, sandalwood (Santalum); -- used specifically to designate an acid obtained as a resinous or red crystalline dyestuff, which is called also santalin..

Undecylenic :: Undecylenic (a.) Pertaining to, or designating, an acid C11H20O2, homologous with acrylic acid, and obtained as a white crystalline substance by the distillation of castor oil..

Oxalantin :: Oxalantin (n.) A white crystalline nitrogenous substance (C6H4N4O5) obtained by the reduction of parabanic acid; -- called also leucoturic acid.

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..

Pyrogallol :: Pyrogallol (n.) A phenol metameric with phloroglucin, obtained by the distillation of gallic acid as a poisonous white crystalline substance having acid properties, and hence called also pyrogallic acid. It is a strong reducer, and is used as a developer in photography and in the production of certain dyes..

Bay Salt :: Bay salt () Salt which has been obtained from sea water, by evaporation in shallow pits or basins, by the heat of the sun; the large crystalline salt of commerce..

Quartz :: Quartz (n.) A form of silica, or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque..

Zirconium :: Zirconium (n.) A rare element of the carbon-silicon group, intermediate between the metals and nonmetals, obtained from the mineral zircon as a dark sooty powder, or as a gray metallic crystalline substance. Symbol Zr. Atomic weight, 90.4..

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..

Sinapoline :: Sinapoline (n.) A nitrogenous base, CO.(NH.C3H5)2, related to urea, extracted from mustard oil, and also produced artifically, as a white crystalline substance; -- called also diallyl urea..

Melamine :: Melamine (n.) A strong nitrogenous base, C3H6N6, produced from several cyanogen compounds, and obtained as a white crystalline substance, -- formerly supposed to be produced by the decomposition of melam. Called also cyanuramide..

Hematein :: Hematein (n.) A reddish brown or violet crystalline substance, C16H12O6, got from hematoxylin by partial oxidation, and regarded as analogous to the phthaleins..

Diphenyl :: Diphenyl (n.) A white crystalline substance, C6H5.C6H5, obtained by leading benzene through a heated iron tube. It consists of two benzene or phenyl radicals united..

Rhodizonic :: Rhodizonic (a.) Pertaining to, or designating, a colorless crystalline substance (called rhodizonic acid, and carboxylic acid) obtained from potassium carboxide and from certain quinones. It forms brilliant red, yellow, and purple salts..

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..

Glaucophane :: Glaucophane (n.) A mineral of a dark bluish color, related to amphibole. It is characteristic of certain crystalline rocks..

Sulphonium :: Sulphonic (a.) Pertaining to, or derived from, a sulphone; -- used specifically to designate any one of a series of acids (regarded as acid ethereal salts of sulphurous acid) obtained by the oxidation of the mercaptans, or by treating sulphuric acid with certain aromatic bases (as benzene); as, phenyl sulphonic acid, C6H5.SO2.OH, a stable colorless crystalline substance..

Benzile :: Benzile (n.) A yellowish crystalline substance, C6H5.CO.CO.C6H5, formed from benzoin by the action of oxidizing agents, and consisting of a doubled benzoyl radical..

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