kwiˈnalˌdēn, -_də̇n noun
Etymology: International Scientific Vocabulary quin- + ald- + -ine
: an oily liquid base CH 3 C 9 H 6 N of a slightly pungent odor obtained by condensation of acetaldehyde and aniline and occurring also in coal tar that is used chiefly in the manufacture of dyes and pharmaceuticals; 2-methyl-quinoline