Salicylal \Sal"i*cyl`al\, n. [Salicylic + aldehide.] (Chem.) A thin, fragrant, colorless oil, {HO.C6H4.CHO}, found in the flowers of meadow sweet ({Spiraea}), 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}. [1913 Webster]
Salicylol \Sal"i*cyl`ol\, n. [Salicylic + L. oleum oil.] (Chem.) Same as {Salicylal}. [1913 Webster]