/kroht'n al"deuh huyd'/ , n. Chem.
a whitish liquid with pungent and suffocating odor, C 4 H 6 O, soluble in water, used as a solvent, in tear gas, and in organic synthesis. Also called betamethyl acrolein, crotonic aldehyde .
[ croton(ic) (see CROTONIC ACID) + ALDEHYDE ]