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A nitrogenous substance resembling vitellin, present in the egg yolk of cartilaginous fishes.

A nitrogenous compound, C7H6N2, analogous to indol, and produced from a diazo derivative or cinnamic acid.

A complex, nitrogenous radical, C8H5NO, regarded as the essential nucleus of indigo.

estuffs, resembling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper has not yet been isolated.

A nitrogenous substance, C8H7NO, isomeric with oxindol, obtained as an oily liquid.

A complex nitrogenous substance, which, by Hermann's hypothesis, is continually decomposed and reproduced in the muscles, during their life.

A nitrogenous base C10H9N, extracted from coal-tar naphtha, as an oily liquid. It is a member of the quinoline series, and is probably identical with lepidine.

A complex nitrogenous radical, C8H4NO2, regarded as the essential residue of a series of compounds, related to isatin, which easily pass by reduction to indigo blue. -- I*sat`o*gen"ic, a.

A crystalline, nitrogenous base, C10H14N2, isomeric with nicotine.

m (also used adjectively), signifying: Pertaining to, or designating, the characteristic, nitrogenous radical, NOH, called the isonitroso group.

Pertaining to, or designating, a complex nitrogenous acid, isomeric with uric acid.

An artificial nitrogenous base, isomeric with urea, and forming a white crystalline substance; -- called also isuretine.

One of a group of nitrogenous phosphorized principles, supposed by Thudichum to exist in brain tissue.

A nitrogenous substance free from phosphorus, supposed to be present in the brain; a body closely related to cerebrin.

A nitrogenous substance, or mixture of substances, containing sulphur in a loose state of combination, and forming the chemical basis of epidermal tissues, such as horn, hair, feathers, and the like. It is an insoluble substance, and, unlike elastin, is not dissolved even by gastric or pancreatic juice. By decompositio…

One of a series of series of complex nitrogenous substances, represented by methyl ketol and related to indol. Methyl ketol, a weak organic base, obtained as a white crystalline substance having the odor of fæces.

designating, an acid obtained from the urine of dogs. By decomposition the acid yields a nitrogenous base (called kynurin) and carbonic acid. [Written also cynurenic.]

Pertaining to, or designating, a nitrogenous organic acid of the uric acid group, obtained by the decomposition of allantoin, and usually called allanturic acid.

A complex, nitrogenous phosphorized substance widely distributed through the animal body, and especially conspicuous in the brain and nerve tissue, in yolk of eggs, and in the white blood corpuscles.

A white, crystalline, nitrogenous substance formed in the decomposition of albuminous matter by pancreatic digestion, by the action of boiling dilute sulphuric acid, and by putrefaction. It is also found as a constituent of various tissues and organs, as the spleen, pancreas, etc., and likewise in the vegetable kingdom…