meth'yl eth'yl ke'tone Chem.
a colorless, flammable liquid, C4
O, produced by synthesis or fermentation: used chiefly as a solvent, as a paint remover, and in the manufacture of plastics. Abbr.:
MEK Also called butanone.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.