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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 in the manufacture of various agricultural chemicals, rubber products, water repellents, dyes, and drugs.
py·rid′ic (pī-rĭd′ĭk) adj.
(Chemistry) relating to pyridine