Definition of quinoline in US English:

quinoline

noun

Chemistry
  • A pungent oily liquid present in coal tar and bone oil.

    A heteroaromatic compound with fused benzene and pyridine rings; chemical formula: C₉H₇N

    • ‘The most important chemical classes of these so-called auxin herbicides include chlorophenoxy acids, benzoic acids, pyridines, and quinoline carboxylic acids.’

Origin

Mid 19th century: from Spanish quina (see quinine) + -ol + -ine.

Pronunciation

quinoline

/ˈkwinəlin//ˈkwɪnəlɪn/