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 (kwĭ-nōn′, kwĭn′ōn′)
1. Either of two isomeric unsaturated cyclic compounds having the formula C6H4O2, found widely in plants, especially in a yellow crystalline form, and used in making dyes, tanning hides, and photography.
2. Any of various quinonoid compounds, often yellow to red in color, many of which have biological derivation or importance, such as coenzyme-Q.


(kwɪˈnəʊn; ˈkwɪnəʊn)
(Elements & Compounds) another name for benzoquinone


(kwɪˈnoʊn, ˈkwɪn oʊn)

1. a yellow, crystalline, cyclic compound, C6H4O2, used chiefly in photography and in tanning leather.
2. any of a class of compounds of this type.
[1850–55; quin(ic acid) a compound found in cinchona bark and the leaves of other plants(quinic < Sp quin(a) quinine + -ic) + -one]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.quinone - any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
coenzyme Q, ubiquinone - any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration
References in periodicals archive ?
Keywords: Synthesis, Dyes, TPDOs, Heterocycles, Microwave, p-chloranil
In the present communication we would like to report thereof p-chloranil as alternative oxidizing agent which might be used to avoid decomposition under microwave heating conditions.
A suspension of p-chloranil (4.68 g, 19.05 mmol) in ethanol (20 mL) was added to a mixture of 3-amino-9-ethylcarbazole (8.0 g, 38.10 mmol) and sodium acetate (3.2 g, 39.0 mmol) in ethanol (30 mL) in small portions.