NCIt definition : Organic compounds with a carbonyl group (C O) bonded to two other carbon atoms as
the skeleton structure. Acetone is the simplest ketone compound.;
Alternative definition : NCI-GLOSS: A type of chemical substance used in perfumes, paints, solvents, and found
in essential oils (scented liquid taken from plants). Ketones are also made by the
body when there is not enough insulin.;