Source : Webster's Revised Unabridged Dictionary (1913)

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}.]