The Collaborative International Dictionary
HOC6H4CHO
Salicylal \Sal"i*cyl`al\, n. [Salicylic + aldehide.] (Chem.) A thin, fragrant, colorless oil, HO.C6H4.CHO, found in the flowers of meadow sweet ( Spir[ae]a), and also obtained by oxidation of salicin, saligenin, etc. It reddens on exposure. Called also salicylol, salicylic aldehyde, and formerly salicylous acid or spiroylous acid.