[ kee-tohn ]
/ ˈki toʊn /
any of a class of organic compounds containing a carbonyl group, CO, attached to two alkyl groups, as CH3COCH3 or CH3COC2H5.
Origin of ketone
< German Keton,
aphetic alteration of Aceton acetone
Related formske·ton·ic [ki-ton-ik] /kɪˈtɒn ɪk/, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for ketonic
British Dictionary definitions for ketonic
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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for ketonicn.
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
Medicine definitions for ketonic
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.
Science definitions for ketonic
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.