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semiquinone

American

[sem-ee-kwi-nohn, -kwin-ohn, sem-ahy-] / ˌsɛm i kwɪˈnoʊn, -ˈkwɪn oʊn, ˌsɛm aɪ- /

noun

Chemistry.

any of the class of free radicals formed as intermediates in the oxidation of a hydroquinone to a quinone.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023