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From The Collaborative International Dictionary of English v.0.48:
Quinaldine \Quin*al"dine\, n. [Quinoline + aldehyde + aniline.] (Chem.) A colorless liquid of a slightly pungent odor, C9H6N.CH3, first obtained as a condensation product of aldehyde and aniline, and regarded as a derivative of quinoline; -- called also methyl quinoline. [Written also chinaldine.] [1913 Webster]