meth·​yl | \ ˈme-thəl How to pronounce methyl (audio) \

Definition of methyl

: an alkyl radical CH3 derived from methane

Other Words from methyl

methylic \ mə-​ˈthi-​lik How to pronounce methyl (audio) \ adjective

Examples of methyl in a Sentence

Recent Examples on the Web To address bad breath, plaque and gingivitis the ADA recommends looking for chlorhexidine, chlorine dioxide, cetylpyridinium chloride and essential oils such as eucalyptol, thymol and methyl salicylate. Jamie Kim, Good Housekeeping, 21 July 2022 Sodium methyl cocoyl taurate creates a light natural creamy foam for the best application while also replacing silicones in the formulation, which can actually build up in hair to be more negative than positive. Grooming Playbook, The Salt Lake Tribune, 16 May 2022 Sodium methyl cocoyl taurate, derived from coconuts, creates a luxuriant lather. Grooming Playbook, The Salt Lake Tribune, 23 May 2022 The travel-size toothpaste-like tube contains a cooling ointment made with pain-relieving camphor, menthol, and methyl salicylate. Rachel Ng, Outside Online, 14 Aug. 2021 By occupying these sites like roadblocks on a highway, methyl groups can alter transcription, a basic step in gene expression where a piece of RNA is made from a DNA template. Rachel Yehuda, Scientific American, 18 June 2022 This shampoo includes aloe barbadensis leaf to act as a natural source of moisture and sodium methyl cocoyl taurate, a mild surfactant that makes this shampoo creamy and luxurious. Grooming Playbook, The Salt Lake Tribune, 1 June 2022 The academic literature in chemistry is filled with papers describing reactions that open and close ring structures, add methyl groups, remove oxygens, and much more. John Timmer, Ars Technica, 3 May 2022 The taste derived from L-aspartyl-L-phenylalnine methyl ester, a dipeptide of amino acids that is 200 times sweeter than sucrose or table sugar. Scott Lafee, San Diego Union-Tribune, 19 Apr. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'methyl.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of methyl

1840, in the meaning defined above

History and Etymology for methyl

International Scientific Vocabulary, back-formation from methylene

Learn More About methyl

Dictionary Entries Near methyl



methyl acetate

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Statistics for methyl

Last Updated

1 Aug 2022

Cite this Entry

“Methyl.” Dictionary, Merriam-Webster, Accessed 18 Aug. 2022.

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More Definitions for methyl


meth·​yl | \ ˈmeth-əl, British also ˈmē-ˌthīl \

Medical Definition of methyl

: an alkyl group CH3 that is derived from methane by removal of one hydrogen atom

Other Words from methyl

methylic \ mə-​ˈthil-​ik How to pronounce methyl (audio) \ adjective

More from Merriam-Webster on methyl

Nglish: Translation of methyl for Spanish Speakers Encyclopedia article about methyl


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