quinone noun. ['kwɪnǝʊn, kwɪ'nǝʊn] Also kinone. M19.
[from QUINA + -ONE.]
Chemistry. Any of a series of aromatic compounds derived from benzene and its homologues by the replacement of two atoms of hydrogen by two of oxygen; spec. = BENZOQUINONE.

■ 'quinonoid adjective & noun (a) adjective resembling or characteristic of a quinone; having a molecular structure like that of quinone; (b) noun a quinonoid compound: L19.

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