D defs.my
Entry 2 senses Webster, 1913

Aldehyde

/(ăl"dē̇*hīd)/ · Al·de·hyde · IPA /ˈæl.dɪ.haɪd/
01 n. A colorless, mobile, and very volatile liquid obtained from alcohol by certain processes of oxidation.
  1. 1.
    A colorless, mobile, and very volatile liquid obtained from alcohol by certain processes of oxidation.(Chem.)
  2. 2.
    Any compound having the group -CHO. Methyl aldehyde, the simplest aldehyde, is more commonly called formaldehyde, H-CHO, and acetic aldehyde is now more commonly called acetaldehyde. The higher aldehydes may be solids. A reducing sugar typically contains the aldehyde group.(Chem.) Also: acetaldehyde
Phrases & compounds
Aldehyde ammonia — a compound formed by the union of aldehyde with ammonia.