-ˌlēn noun
( -s )
Etymology: International Scientific Vocabulary amyl + -ene
: any of several low-boiling olefin hydrocarbons C 5 H 10 : as
a. : a flammable liquid CH 3 CH = C(CH 3 ) 2 obtained from fusel oil by dehydration; 2-methyl-2-butene — called also beta-isoamylene, trimethylethylene
b. : pentene