Pyridine
Pronunciation : Pyr"i*dine
Part of Speech : n.
Etymology : [From Gr. (Physiol. Chem.)
Definition : Defn: 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 ptoma?nes, may be mentioned. See Lutidine.
Source : Webster's Unabridged Dictionary, 1913