bu·​tyl ˈbyü-tᵊl How to pronounce butyl (audio)
: any of four isomeric alkyl radicals C4H9− derived from butane

Examples of butyl in a Sentence

Recent Examples on the Web Those badges can detect butyl acrylate in air at levels as low as 9 parts per billion. Brenda Goodman, CNN, 9 Mar. 2024 The resulting fire sent a towering plume of black smoke over the town three days after the derailment spilled several other hazardous chemicals, including butyl acrylate, ethylene glycol monobutyl ether, ethylhexyl acrylate and isobutylene. CBS News, 27 July 2023 Low levels of butyl acrylate were detected in samples of the Ohio River, though the areas where the chemical has been identified are currently far upstream of Cincinnati, according to the memo. Quinlan Bentley, The Enquirer, 10 Feb. 2023 One of the chemicals was butyl acrylate – a hazardous compound recently identified in the train derailment in East Palestine, Ohio – which could pose problems for residents’ health in the long term, scientists say. Alexandra Meeks, CNN, 27 Mar. 2023 Chemicals of concern feared to have spilled into the Delaware include butyl acrylate and ethyl acrylate, both used for making resins, plastics and adhesives, city officials said. Julianne McShane, NBC News, 26 Mar. 2023 Antioxidants like tertiary-butyl hydroquinone (TBHQ) can extend the shelf life of instant noodles by preventing the oxidation of fats and oils; this happens by donating electrons to neutralize free radicals, which stabilize the radical’s instability [1]. Ashton Yoon, Discover Magazine, 25 Apr. 2017 Still, the floral, fruity odor of the chemical butyl acrylate still wafts up from the streams. Brenda Goodman, CNN, 3 Mar. 2023 Trace amounts of butyl acrylate were found in the water but will not affect drinking water from the river, Tim Barker, treatment operation supervisor for the Parkersburg Utility Board, told the outlet. Sudiksha Kochi, USA TODAY, 19 Feb. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'butyl.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


International Scientific Vocabulary butyric + -yl

First Known Use

1850, in the meaning defined above

Time Traveler
The first known use of butyl was in 1850

Dictionary Entries Near butyl

Cite this Entry

“Butyl.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/butyl. Accessed 18 May. 2024.

Medical Definition


bu·​tyl ˈbyüt-ᵊl How to pronounce butyl (audio)
: any of four isomeric monovalent radicals C4H9 derived from butanes
Last Updated: - Updated example sentences
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