quinone


qui·none

noun \kwin-ˈōn, ˈkwin-ˌ\

Definition of QUINONE

1
: either of two isomeric cyclic crystalline compounds C6H4O2 that are extremely irritating to the skin and mucous membranes
2
: any of various usually yellow, orange, or red quinonoid compounds including several that are biologically important as coenzymes, hydrogen acceptors, or vitamins

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