ˈbyüd. ə lˌēn, -üt ə l- noun
( -s )
Etymology: International Scientific Vocabulary butyl + -ene
1. : any of three isomeric flammable easily liquefiable gaseous hydrocarbons C 4 H 8 of the ethylene series obtained usually by the cracking of petroleum and converted into gasoline by polymerization:
a. : the normal compound CH 2 = CHCH 2 CH 3 used in making butadiene — called also alpha-butylene, 1-butene
b. : the normal symmetrical compound CH 3 CH = CHCH 3 occurring in cis and trans forms used in making butadiene — called also beta-butylene, 2-butene
c. : isobutylene
2. : any of four isomeric alkylene radicals C 4 H 8 (as tetramethylene) derived from normal butane