D defs.my
Entry 1 sense Webster, 1913

Pyridine

· Pyr·i·dine · IPA / ˈpɪrɪˌdin/
01 n. A nitrogenous base, C5H5N, obtained from the distillation of bone oil or coal tar, and by the decomposition of certain alkaloids, as a colo…
  1. 1.
    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.(Physiol. Chem.) See: Lutidine