a clear, colorless, syrupy liquid, CHCHOHCHCHO, obtained by condensation of acetaldehyde: used as a solvent, in organic synthesis, and as a hypnotic and sedative
See aldol in American Heritage Dictionary 4
(ălˈdôlˌ, -dōlˌ, -dŏlˌ)
noun
A thick, colorless to pale yellow liquid, C4H8O2, obtained from acetaldehyde and used in perfumery and as a solvent.