Aldehyde /(ăl"dē̇*hīd)/

Al·de·hyde

Aldehyde

n.
  1. A colorless, mobile, and very volatile liquid obtained from alcohol by certain processes of oxidation. (Chem.)
  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.)

Phrases & Compounds
Aldehyde ammonia
a compound formed by the union of aldehyde with ammonia.