- (modifier) of, consisting of, or containing any of four isomeric forms of the group C4H9–: butyl rubber
WordReference Random House Unabridged Dictionary of American English © 2026
bu•tyl
(byo̅o̅′til, byo̅o̅t′l),USA pronunciation adj. [Chem.]
Bu•tyl (byo̅o̅′til, byo̅o̅t′l),USA pronunciation [Trademark.]
- Chemistrycontaining a butyl group.
- but(yric) + -yl 1865–70
Bu•tyl (byo̅o̅′til, byo̅o̅t′l),USA pronunciation [Trademark.]
- Chemistry, Trademarksa brand of synthetic rubber prepared by polymerization of butylene containing little butadiene, particularly useful for inner tubes of automobile tires because of its leakproof qualities.
Collins Concise English Dictionary © HarperCollins Publishers::
butyl /ˈbjuːˌtaɪl; -tɪl/ n
'butyl' also found in these entries (note: many are not synonyms or translations):
butanol
- butyl alcohol
- butyl rubber
- TBT
- acebutolol
- butabarbital sodium
- butyl acetate
- butyl aldehyde
- butylate
- butylene
- butyl group
- butyl nitrite
- butyraldehyde
- dibutyl phthalate
- diisobutyl phthalate
- elastomer
- inhalant
- isobutylene
- isobutyl nitrite
- isobutyl propionate
- popper