any of a class of organic compounds containing a carbonyl group, CO, attached to two alkyl groups, as CH3COCH3 or CH3COC2H5.
Origin of ketone
1850–55;Related formske·ton·ic [ki-ton-ik] /kɪˈtɒn ɪk/, adjective
< German Keton,
aphetic alteration of Aceton acetone
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for ketone
Historical Examples of ketone
Ionone, a ketone first prepared by Tiemann, and having when diluted a pronounced violet odour.
Besides methyl salicylate, the oil contains triaconitane, an aldehyde or ketone, and an alcohol.
Even the common linseed contains a glucoside which breaks up into sugar, prussic acid, and a ketone.
If the groups R and R′ are identical, the ketone is called a simple ketone, if unlike, a mixed ketone.
The hexoses all contain five alcoholic groups and one primary aldehyde, or one secondary aldehyde (ketone), group.
British Dictionary definitions for ketone
Derived Formsketonic (kɪˈtɒnɪk), adjective any of a class of compounds with the general formula R′COR, where R and R′ are alkyl or aryl groupsSee also acetone
Word Origin for ketone
C19: from German Keton, from Aketon acetone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for ketone
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
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.
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.