Main Entry:

al·de·hyde

Pronunciation:

\ˈal-də-ˌhīd\

Function:

noun

Etymology:

German Aldehyd, from New Latin al. dehyd., abbreviation of alcohol dehydrogenatum dehydrogenated alcohol

Date:

circa 1846

: acetaldehyde ; broadly : any of a class of highly reactive organic compounds that are analogous to acetaldehyde and characterized by a carbonyl group attached to a hydrogen atom

— al·de·hy·dic \ˌal-də-ˈhī-dik\ adjective