One of the mysteries of the English language finally explained.
A pungent oily liquid present in coal tar.
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.’
Mid 19th century: from Spanish quina (see quinine) + -ol + -ine.
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