Ketone

n. organic compound containing a carbonyl group (Chemistry)

A ketone (pronounced as key tone) is either the functional group characterized by a carbonyl group (O=C) linked to two other carbon atoms or a chemical compound that contains this functional group. A ketone can be generally represented by the formula:R1(CO)R2.A carbonyl carbon bonded to two carbon atoms distinguishes ketones from carboxylic acids, aldehydes, esters, amides, and other oxygen-containing compounds. The double-bond of the carbonyl group distinguishes ketones from alcohols and ethers. The simplest ketone is acetone (systematically named 2-propanone).
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Ketone /ke·tone/ any of a class of organic compounds containing the carbonyl group, CdbondO, whose carbon atom is joined to two other carbon atoms, [more]Ketone - Community and Resources

Noun
1. any of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals
(hypernym) organic compound
(hyponym) acetone, propanone, dimethyl ketone
(substance-holonym) nabumetone, Relafen

n. ketone, organic compound containing a carbonyl group (Chemistry)