D defs.my
Entry 1 sense Webster, 1913

Olefiant

· O·le·fi·ant · IPA
01 a. Forming or producing an oil; specifically, designating a colorless gaseous hydrocarbon called ethylene (olefiant gas).
  1. 1.
    Forming or producing an oil; specifically, designating a colorless gaseous hydrocarbon called ethylene (olefiant gas).(Chem.) [Archaic]