Definition of ethyl
: an alkyl radical CH3CH2− derived from ethane
ethylicplay \e-ˈthi-lik\ adjective
Origin and Etymology of ethyl
German Ethyl (now Äthyl), from Äther ether + -yl
First Known Use: 1834
Seen and Heard
What made you want to look up ethyl? Please tell us where you read or heard it (including the quote, if possible).