Definition of alkadiene in US English:

alkadiene

(also alkadiëne)

noun

Chemistry
  • Any unsaturated hydrocarbon that has two carbon–carbon double bonds in its molecule; especially a straight-chain hydrocarbon of this kind.

Origin

Early 20th century. From German Alkadien from alk- (in Alken) + Dien, with insertion of -a- apparently for euphony.

Pronunciation

alkadiene

/ˌalkəˈdʌɪiːn/