Butylene
Butylene ({not transcribed}) , noun
[From Butyl.]
1.
(Chemistry) Any one of three metameric hydrocarbons, C4H8, of the ethylene series. They are gaseous or easily liquefiable; -- called also butene.
2.
the hypothetical divalent radical -(CH2)4-; -- used in combining forms; as, butylene diamine.