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[kwi-nohn, kwin-ohn] /kwɪˈnoʊn, ˈkwɪn oʊn/
noun, Chemistry.
a yellow, crystalline, cyclic unsaturated diketone, C 6 H 4 O 2 , formed by oxidizing aniline or hydroquinone: used chiefly in photography and in tanning leather.
any of a class of compounds of this type.
Also, chinone.
Origin of quinone
1850-55; quin(ic acid) + -one Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for quinone
Historical Examples
  • Thus there is quinone itself, or benzoquinone, which is benzene with two atoms of oxygen replacing two atoms of hydrogen.

    Coal Raphael Meldola
  • The compound is readily prepared by the action of sulphurous acid or any other reducing agent on the quinone.

    Coal Raphael Meldola
  • Phenanthrene forms a quinone which has been utilized as a source of colouring-matters, but these are comparatively unimportant.

    Coal Raphael Meldola
  • The various pathological conditions mentioned before may be ascribed to irritation caused by quinone di-imine.

  • The quinone with which we are at present concerned is anthraquinone.

    Coal Raphael Meldola
  • The so-called chrysophanic acid found in Xanthoria (Physcia) parietina is not an acid but a quinone and is better termed physcion.

British Dictionary definitions for quinone


/kwɪˈnəʊn; ˈkwɪnəʊn/
another name for benzoquinone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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quinone in Medicine

quinone qui·none (kwĭ-nōn', kwĭn'ōn')
Any of a class of aromatic compounds found widely in plants, especially the crystalline form used in making dyes.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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quinone in Science
  (kwĭ-nōn', kwĭn'ōn')   
  1. Any of a class of organic compounds that occur naturally as pigments in bacteria, plants, and certain fungi. Quinones have two carbonyl groups (CO) in an unsaturated six-member carbon ring.

  2. A yellow crystalline compound belonging to this class, used in photography, to make dyes and to tan hides. Chemical formula: C6H4O2.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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