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[kee-tohn] /ˈki toʊn/
noun, Chemistry.
any of a class of organic compounds containing a carbonyl group, CO, attached to two alkyl groups, as CH 3 COCH 3 or CH 3 COC 2 H 5 .
containing the ketone group.
Origin of ketone
1850-55; < German Keton, aphetic alteration of Aceton acetone
Related forms
[ki-ton-ik] /kɪˈtɒn ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for ketonic


any of a class of compounds with the general formula R′COR, where R and R′ are alkyl or aryl groups See also acetone
Derived Forms
ketonic (kɪˈtɒnɪk) adjective
Word Origin
C19: from German Keton, from Aketonacetone
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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Word Origin and History for ketonic



chemical group, 1851, from German keton, coined in 1848 by German chemist Leopold Gmelin (1788-1853) from German Aketon, from French acétone (see acetone). Its comb. form is keto-.

Online Etymology Dictionary, © 2010 Douglas Harper
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ketonic in Medicine

ketone ke·tone (kē'tōn')
Any of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ketonic in Science
Any of a class of organic compounds having the general formula RCOR', where R and R' are hydrocarbon radicals that are both attached to the carbon atom of the carbonyl (CO) group. Acetone is a ketone.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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