The Collaborative International Dictionary
Olefiant
Olefiant \O*le"fi*ant\, a. [F. ol['e]fiant, fr.L. oleum oil + -ficare (in comp.). Cf. -Fy.] (Chem.) Forming or producing an oil; specifically, designating a colorless gaseous hydrocarbon called ethylene (olefiant gas).
Wiktionary
olefiant
a. That produces oil
Usage examples of "olefiant".
For such waves olefiant gas, for example, would vastly transcend it in absorbing power.