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n. A flammable, colorless or yellowish liquid base, C5H5N, having a penetrating odor and serving as the parent compound of many biologically important derivatives. It is used as a solvent and waterproofing agent and in the manufacture of various drugs and vitamins.

n. Any of a class of aromatic heterocyclic compounds containing a ring of five carbon atoms and an nitrogen atom; especially the simplest one, C5H5N.

n. A nitrogenous base, C5H5N, obtained from the distillation of bone oil or coal tar, and by the decomposition of certain alkaloids, as a colorless liquid with a peculiar pungent odor. It is the nucleus of a large number of organic substances, among which several vegetable alkaloids, as nicotine and certain of the ptomaïnes, may be mentioned. See lutidine.

n. A colorless liquid (C5H5N) of pungent odor, derived from coal-tar, and useful in allaying asthmatic paroxysms.

n. a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal

"And Professor See, the eminent French physician, believes that the pyridine is the relieving agent."

base    alkali   

lutidine   

triphosphopyridine   

isoquinoline    bifunctional    high-affinity    thiolate    tetrahydrofuran    anhydride    flavin    chiral    tartrate    guanine