[(Science: chemistry) A nitrogenous base, C9H7N obtained as a pungent colourless 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. Alternative forms: chinoline. Origin: Quinine _ L. Oleum oil _ -ine.
[1. A volatile nitrogenous base obtained by the distillation of coal tar, bones, alkaloids, and other substances; a basic structure of many dyes and drugs; also used as an antimalarial.2. One of a class of alkaloids based on the quinoline (1) structure.