n.
A colorless, volatile, extremely flammable liquid ketone, CH3COCH3, widely used as an organic solvent.
acetonic ac'e·ton'ic (-tŏn'ĭk) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.