— ketonic /ki ton"ik/ , adj.
/kee"tohn/ , n. Chem.
1. 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 .
adj.
2. containing the ketone group.
[ 1850-55; Keton, aph. alter. of Aceton ACETONE ]