- (modifier) of, consisting of, or containing the monovalent group C2H5-: ethyl group or radical
WordReference Random House Unabridged Dictionary of American English © 2026
eth•yl
(eth′əl),USA pronunciation adj.
n.
- Chemistrycontaining the ethyl group, as ethyl ether, C4H10O.
n.
- Chemistrya type of antiknock fluid, containing tetraethyl lead and other ingredients for a more even combustion.
- German Ethyl, coined by J. von Liebig in 1834; see ether, -yl
Collins Concise English Dictionary © HarperCollins Publishers::
ethyl /ˈiːθaɪl; ˈɛθɪl/ n
'ethyl' also found in these entries (note: many are not synonyms or translations):
alcohol
- amphetamine
- aspartame
- benzocaine
- butanone
- ester
- ether
- ethyl acetate
- ethyl alcohol
- ethyl ether
- ethyne
- fermentation
- mestranol
- methyl ethyl ketone
- pethidine
- rubbing alcohol
- urethane
- vinegar
- absolute alcohol
- acetal
- acetic acid
- acetic ether
- alkyl group
- blackstrap molasses
- chloral
- chloroethane
- chloroform
- denatured alcohol
- dichlorodiethyl sulfide
- dichloroethyl formal
- diethylacetal
- diethylaminoethanol
- diethylcarbamazine
- diethyl ether
- diethylpropion
- diethylstilbestrol
- diethyltoluamide
- diethyltryptamine
- DMSO
- et
- ethereal
- ethylamine
- ethyl aminobenzoate
- ethylate
- ethylbenzene
- ethyl butyrate
- ethyl caproate
- ethyl carbamate
- ethyl cellulose
- ethyl chloride