chinone

Main Entry: qui·none
Pronunciation: kwin-'On, 'kwin-"
Function: noun
1 : either of two isomeric cyclic crystalline compoundsC₆H₄O₂ that are extremely irritating to the skin and mucous membranes
2 : any of various usually yellow, orange, or red quinonoid compoundsincluding several that are biologically important as coenzymes, hydrogen acceptors, or vitamins

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

quinone   (kwĭ-nōn', kwĭn'ōn')  Pronunciation Key  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. A yellow crystalline compound belonging to this class, used in photography, to make dyes and to tan hides. Chemical formula: C6H4O2.