- any of a class of organic compounds containing a carbonyl group, CO, attached to two alkyl groups, as CH3COCH3 or CH3COC2H5.
- containing the ketone group.
Origin of ketone
1850–55; < German Keton, aphetic alteration of Aceton acetone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for 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.Poisons: Their Effects and Detection
Alexander Wynter Blyth
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.The Chemistry of Plant Life
Roscoe Wilfred Thatcher
- any of a class of compounds with the general formula R′COR, where R and R′ are alkyl or aryl groupsSee also acetone
C19: from German Keton, from Aketon acetone
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.