[ meth-uh l ]
/ ˈmɛθ əl /

adjective Chemistry.

containing the methyl group.

Origin of methyl

First recorded in 1835–45; by back formation from methylene

Related forms

me·thyl·ic [me-thil-ik, muh-] /mɛˈθɪl ɪk, mə-/, adjective

Definition for methyl (2 of 2)


a combining form occurring in the names of chemical compounds in which the methyl group is present: methylamine. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for methyl

British Dictionary definitions for methyl


/ (ˈmiːθaɪl, ˈmɛθɪl) /


(modifier) of, consisting of, or containing the monovalent group of atoms CH 3
an organometallic compound in which methyl groups are bound directly to a metal atom

Derived Forms

methylic (məˈθɪlɪk), adjective

Word Origin for methyl

C19: from French méthyle, back formation from methylene
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

Medicine definitions for methyl


[ mĕthəl ]


The alkyl group, often a univalent radical, CH3, derived from methane and occurring in many important organic compounds.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for methyl


[ mĕthəl ]

The radical CH3, derived from methane.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.