bu·​tyl | \ ˈbyü-tᵊl How to pronounce butyl (audio) \

Definition of butyl

: any of four isomeric alkyl radicals C4H9− derived from butane

Examples of butyl in a Sentence

Recent Examples on the Web The land slated for Dollar General was previously occupied by an ExxonMobil fuel station, which experienced a leak of the gasoline additive methyl tert-butyl ether, or MTBE, in 2004. David Anderson, baltimoresun.com, 13 May 2021 Instead, opt for eliminator drop cloths, which are made of heavyweight, leak-resistant butyl and won’t slide. Washington Post, 23 Feb. 2021 The board voted 4-0 to implement a reduced rate increase by taking $150,000 from a fund reserved for cleaning water that has been contaminated by methyl tert-butyl ether, or MTBE, a volatile organic compound. Alejandra Reyes-velarde, latimes.com, 28 June 2018 Alpha-tocopherol, pyridoxal phosphate, pantothenic acid, tyrosine tryptophan, butyl butanoate, phloretin xyloglucoside, ethyl hexanoate. Eric Spitznagel, Bon Appetit, 21 July 2017 Butyl urea slows the formation of those H-bonds, preventing curl. Patrick Di Justo, WIRED, 26 Apr. 2011

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

First Known Use of butyl

1850, in the meaning defined above

History and Etymology for butyl

International Scientific Vocabulary butyric + -yl

Learn More About butyl

Dictionary Entries Near butyl



butyl acetate

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Statistics for butyl

Cite this Entry

“Butyl.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/butyl. Accessed 28 Jun. 2022.

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More Definitions for butyl


bu·​tyl | \ ˈbyüt-ᵊl How to pronounce butyl (audio) \

Medical Definition of butyl

: any of four isomeric monovalent radicals C4H9 derived from butanes


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