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- Nitrogenous - a. - Of, pertaining to, or resembling, nitrogen; as, a nitrogenous principle; nitrogenous compounds.
- Elastin - n. - A nitrogenous substance, somewhat resembling albumin, which forms the chemical basis of elastic tissue. It is very insoluble in most fluids, but is gradually dissolved when digested with either pepsin or trypsin.
- Kynurenic - a. - Pertaining to, or designating, an acid obtained from the urine of dogs. By decomposition the acid yields a nitrogenous base (called kynurin) and carbonic acid.
- Diureide - n. - One of a series of complex nitrogenous substances regarded as containing two molecules of urea or their radicals, as uric acid or allantoin. Cf. Ureide.
- Chondrin - n. - A colorless, amorphous, nitrogenous substance, tasteless and odorless, formed from cartilaginous tissue by long-continued action of boiling water. It is similar to gelatin, and is a large ingredient of commercial gelatin.
- Dioxindol - n. - A white, crystalline, nitrogenous substance obtained by the reduction of isatin. It is a member of the indol series; -- hence its name.
- Violantin - n. - A complex nitrogenous substance, produced as a yellow crystalline substance, and regarded as a complex derivative of barbituric acid.
- Hyaline - n. - The main constituent of the walls of hydatid cysts; a nitrogenous body, which, by decomposition, yields a dextrogyrate sugar, susceptible of alcoholic fermentation.
- Protamin - n. - An amorphous nitrogenous substance found in the spermatic fluid of salmon. It is soluble in water, which an alkaline reaction, and unites with acids and metallic bases.
- Parabanic - a. - Pertaining to, or designating, a nitrogenous acid which is obtained by the oxidation of uric acid, as a white crystalline substance (C3N2H2O3); -- also called oxalyl urea.
- Diastase - n. - A soluble, nitrogenous ferment, capable of converting starch and dextrin into sugar.
- Betaine - n. - A nitrogenous base, C5H11NO2, produced artificially, and also occurring naturally in beet-root molasses and its residues, from which it is extracted as a white crystalline substance; -- called also lycine and oxyneurine. It has a sweetish taste.
- Oxalethyline - n. - A poisonous nitrogenous base (C6H10N2) obtained indirectly from oxamide as a thick transparent oil which has a strong narcotic odor, and a physiological action resembling that of atropine. It is probably related to pyridine.
- Phenanthridine - n. - A nitrogenous hydrocarbon base, C13H9N, analogous to phenanthrene and quinoline.
- Isonicotine - n. - A crystalline, nitrogenous base, C10H14N2, isomeric with nicotine.
- Protagon - n. - A nitrogenous phosphorized principle found in brain tissue. By decomposition it yields neurine, fatty acids, and other bodies.
- Nitrogenous - a. - Of, pertaining to, or resembling, nitrogen; as, a nitrogenous principle; nitrogenous compounds.
- Murexan - n. - A complex nitrogenous substance obtained from murexide, alloxantin, and other ureids, as a white, or yellowish, crystalline which turns red on exposure to the air; -- called also uramil, dialuramide, and formerly purpuric acid.
- Pyrrol - n. - A nitrogenous base found in coal tar, bone oil, and other distillates of organic substances, and also produced synthetically as a colorless liquid, C4H5N, having on odor like that of chloroform. It is the nucleus and origin of a large number of derivatives. So called because it colors a splinter of wood moistened with hydrochloric acid a deep red.
- 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.
- Phenanthroline - n. - Either of two metameric nitrogenous hydrocarbon bases, C12H8N2, analogous to phenanthridine, but more highly nitrogenized.
- Kerasin - n. - A nitrogenous substance free from phosphorus, supposed to be present in the brain; a body closely related to cerebrin.
- Safranine - n. - An orange-red nitrogenous dyestuff produced artificially by oxidizing certain aniline derivatives, and used in dyeing silk and wool; also, any one of the series of which safranine proper is the type.
- Creatin - n. - A white, crystalline, nitrogenous substance found abundantly in muscle tissue.
- Murexoin - n. - A complex nitrogenous compound obtained as a scarlet crystalline substance, and regarded as related to murexide.
- Creatinin - n. - A white, crystalline, nitrogenous body closely related to creatin but more basic in its properties, formed from the latter by the action of acids, and occurring naturally in muscle tissue and in urine.