any organic compound containing the group -CHO. Aldehydes are oxidized to carboxylic acids and take part in many addition reactions - (modifier)
consisting of, containing, or concerned with the group -CHO: aldehyde group or radical
WordReference Random House Unabridged Dictionary of American English © 2026
al•de•hyde
(al′də hīd′),USA pronunciation n. [Chem.]
al′de•hy′dic, adj.
- Chemistryany of a class of organic compounds containing the group -CHO, which yields acids when oxidized and alcohols when reduced.
- Neo-Latin al(cohol) dehyd(rogenātum) dehydrogenated alcohol
- 1840–50
Collins Concise English Dictionary © HarperCollins Publishers::
'aldehyde' also found in these entries (note: many are not synonyms or translations):
-al
- acetaldehyde
- acraldehyde
- acrolein
- acrylaldehyde
- al
- aldohexose
- aldol
- aldose
- amino resin
- anisaldehyde
- anisic aldehyde
- benzaldehyde
- benzoic aldehyde
- butyl aldehyde
- butyraldehyde
- chloral
- cinnamic aldehyde
- citral
- crotonaldehyde
- cyclamen aldehyde
- dodecanal
- dodecyl aldehyde
- formaldehyde
- furfural
- glutaraldehyde
- glyceraldehyde
- hydrocinnamic aldehyde
- lauraldehyde
- lauric aldehyde
- methylglyoxal
- oxyaldehyde
- paraldehyde
- phenolic resin
- phenylacetaldehyde
- piperonal
- plasmalogen
- polyvinyl acetal
- propionaldehyde
- propyl aldehyde
- pyromucic aldehyde
- pyruvic aldehyde
- retinal
- retinene
- salicylaldehyde
- thioaldehyde
- vanillin
- vitamin A aldehyde