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[eth-uh l] /ˈɛθ əl/
Chemistry. containing the ethyl group, as ethyl ether, C 4 H 10 O.
a type of antiknock fluid, containing tetraethyl lead and other ingredients for a more even combustion.
Origin of ethyl
< German Ethyl, coined by J. von Liebig in 1834; see ether, -yl
Related forms
nonethyl, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for ethyl


/ˈiːθaɪl; ˈɛθɪl/
(modifier) of, consisting of, or containing the monovalent group C2H5-: ethyl group or radical
Derived Forms
ethylic (ɪˈθɪlɪk) adjective
Word Origin
C19: from eth(er) + -yl
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ethyl

1838, modeled on German äthyl (Liebig), from Greek aither (see ether) + -yl. Ethyl alcohol, under other names, was widely used in medicine by 13c.

Online Etymology Dictionary, © 2010 Douglas Harper
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ethyl in Medicine

ethyl eth·yl (ěth'əl)
The univalent hydrocarbon radical C2H5.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ethyl in Science
The radical C2H5, derived from ethane.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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