[] 烯

[医] 烯[属]



olefin
[ noun ]
any unsaturated aliphatic hydrocarbon
<noun.substance>




olefin \o"le*fin\, olefine \o"le*fine\([=o]"l[-e]*f[i^]n or
[=o]"l[-e]*f[=e]n), n. [From {Olefiant}.]
1. (Chem.) Olefiant gas, or ethylene. See {Ethylene}.
[archaic]

2. Hence: (Chem.) Any one of the series of unsaturated
hydrocarbons of which ethylene is the type; a member of
the alkene series of hydrocarbons; an alkene.
[1913 Webster + PJC]