Quinoline n. : 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.

Example:
What is the meaning of "4H" in 6-bromo-4-oxo-4H-Quinoline?

Taxonomy
Quinoline, precursor, analog, free encyclopedia, pyridine, synthesis, Combes quinoline synthesis, Camps quinoline synthesis, Knorr quinoline synthesis, nitrogen atom, Niementowski quinoline synthesis, derivatives, organic solvents, aniline, search, benzo, Identifiers, g/mol.

Defination from the web:
Quinoline is only slightly soluble in cold water but dissolves readily in hot water and most organic solvents. Quinoline is mainly used as a building block to other specialty chemicals. ... Retrieved from "http://en.wikipedia.org/wiki/Quinoline" ...