salicylal

from The Century Dictionary.

• noun Same as salicylic aldehyde.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A thin, fragrant, colorless oil, HO.C6H4.CHO, found in the flowers of meadow sweet (Spiræa), 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry A fragrant oil, HO.C6H4.CHO, found in the flowers of meadowsweet and also obtained by oxidation of salicin, saligenin, etc.