\▐kē-▐ tōn\ n [Gr Keton, alter. of Aceton acetone] (1851) An organic compound containing a carbonyl group (C=O) bound to two carbon atoms. The simplest one is acetone, (CH3)2C=O. It and the other lower ketones are widely used as solvents for vinyl and cellulosic resins, and as intermediates in the production of resins. (Odian GC (2004) Principles of polymerization. Wiley, New York).