any of four univalent isomeric groups having the formula C 4 H 9 –.
a volatile liquid, C 4 H 9 NO 2 , the vapor of which can cause headache and vasodilation, used as an active ingredient in some household deodorizers, and misused by inhalation to prolong the sensation of orgasm.
noun a copolymer of isobutene and isoprene, used in tyres and as a waterproofing material
to introduce one or more butyl groups into (a compound). butylate (byt’l-āt’) To bring a butyl group into a compound.