a colourless or yellowish flammable poisonous pungent liquid used in the manufacture of resins and pharmaceuticals. Formula: CH2:CHCHO
Word origin
C19: from Latin ācer sharp + olēre to smell + -in
acrolein in American English
(əˈkroʊliɪn)
noun
a yellowish or colorless, acrid liquid, CH2:CHCHO, whose fumes irritate the eyes: it is formed by the decomposition of glycerol and is used in organic synthesis and in plastics, poison gas, etc.