an olefin that contains two carbon-to-carbon double bonds in its molecules
diolefin in American English
(daiˈouləfɪn)
noun
Chemistry
diene
Word origin
[1905–10; di-1 + olefin]This word is first recorded in the period 1905–10. Other words that entered Englishat around the same time include: Expressionism, airway, cadre, jazz, revolving doordi- is a prefix occurring in loanwords from Greek, where it meant “two,” “twice,” “double”(diphthong). On this model, di- is freely used in the formation of compound words (dicotyledon; dipolar) and in chemical terms (diatomic; disulfide)