quinone

noun

qui·none | \ kwi-ˈnōn

, ˈkwi-ˌnōn\

Definition of quinone

1 : either of two isomeric cyclic crystalline compounds C₆H₄O₂ that are derivatives of benzene

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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Quinones won the rescue board race and beach flags events in the Boys B Division. — Gary Curreri, Sun-Sentinel.com, "Junior lifeguards honor teammate at skills competition with heavy hearts," 28 July 2017 Quinones explores this phenomenon by talking to everyone involved, from addicts and parents to doctors, scientists, cops, and even Mexican drug traffickers. — Andy Borowitz, The New Yorker, "The Books We’re Turning to Now," 2 Feb. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quinone.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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The first known use of quinone was in 1853

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quinone

noun

qui·none | \ kwin-ˈōn, ˈkwin-ˌ

Medical 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