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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Al·de·hyde n.
 1. Chem. A colorless, mobile, and very volatile liquid obtained from alcohol by certain processes of oxidation.
 Note:The aldehydes are intermediate between the alcohols and acids, and differ from the alcohols in having two less hydrogen atoms in the molecule, as common aldehyde (called also acetaldehyde, acetic aldehyde or ethyl aldehyde), C2H4O; methyl aldehyde (called also formaldehyde), CH2O.
 Aldehyde ammonia Chem., a compound formed by the union of aldehyde with ammonia.
 

From: Webster's Revised Unabridged Dictionary (1913)

 Eth·yl n.  Chem. A monatomic, hydrocarbon radical, C2H5 of the paraffin series, forming the essential radical of ethane, and of common alcohol and ether.
 Ethyl aldehyde. Chem. See Aldehyde.