Definition of butyl in English:

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Pronunciation: /ˈbjuːtʌɪl/
Pronunciation: /ˈbjuːtɪl/


[as modifier] Chemistry
1Of or denoting an alkyl radical —C4H9, derived from butane: butyl acetate See also isobutyl.
More example sentences
  • These may contain solvents such as toluene, isopropryl alcohol, ethyl and butyl acetates, acetone and other ketones.
  • The most durable exterior house paints are based on acrylic co-polymers of materials like methyl methacrylate and butyl acrylate.
  • These reformulated gasolines contain either corn-derived ethanol or natural-gas derivatives such as MTBE (methyl tertiary butyl ether).
1.1 short for butyl rubber.
Example sentences
  • Good ventilation, goggles, and butyl or nitrile rubber gloves are essential; work in a hood is recommended.
  • Several types of synthetic materials also may be referred to as latex (eg, butyl, petroleum-based materials) but these do not contain the proteins that cause allergic reactions.
  • Seam problems were resolved by the introduction of butyl seam tapes as a replacement for earlier liquid-applied neoprene adhesive.


Mid 19th century: from butyric acid + -yl.

Words that rhyme with butyl

futile, rutile, utile

For editors and proofreaders

Line breaks: butyl

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