butyl

noun

bu·​tyl ˈbyü-tᵊl 

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

Examples of butyl in a Sentence

Recent Examples on the Web

Since the late 1980s, the federal government has outlawed the sale of butyl and alkyl nitrites, two of the chemical compounds that are commonly bottled as poppers. —David MacK, Rolling Stone, 19 Mar. 2025

That model of train car, the NTSB found, is being phased out for such use and won’t be eligible to carry butyl acrylate after May 2029. —Justine McDaniel, Washington Post, 25 June 2024

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

Word History

Etymology

International Scientific Vocabulary butyric + -yl

First Known Use

1850, in the meaning defined above

Phrases Containing butyl

• butyl alcohol
• butyl nitrite
• butyl rubber

Rhymes for butyl

• brutal
• futile
• utile
• dibutyl
• nembutal
• isobutyl

Medical Definition

butyl

noun

bu·​tyl ˈbyüt-ᵊl 

: any of four isomeric monovalent radicals C₄H₉ derived from butanes