n. An organic compound containing a hydroxyl group bonded to a carbon atom, which is doubly bonded to another carbon atom.
The Century Dictionary and Cyclopedia
n. One of several compounds containing the unsaturated alcoholic group –CH:COH–.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an organic compound that contains a hydroxyl group bonded to a carbon atom which in turn is doubly bonded to another carbon atom
Word Usage
"A paper entitled "The Detection of Ethylketen and enol-Crotonaldehyde in the Vapour-phase Photolysis of trans-Crotonaldehyde" reported some of my work in 1968 after I had moved on to graduate school."