quinoline

An aromatic organic base, C₉H₇N, having a pungent tarlike odor, synthesized or obtained from coal tar, and used as a food preservative and in making antiseptics, drugs, and dyes.

Same as chinoline.

A nitrogenous base, C9H7N obtained as a pungent colorless liquid by the distillation of alkaloids, bones, coal tar, etc. It the nucleus of many organic bodies, especially of certain alkaloids and related substances; hence, by extension, any one of the series of alkaloidal bases of which quinoline proper is the type.

Any of a class of aromatic heterocyclic compounds containing a benzene ring fused with a pyridine ring; especially the simplest such compound, C9H7N.