The Collaborative International Dictionary of English v.0.48:

Oleic \O"le*ic\ ([=o]*l[=e]"[i^]k or [=o]*l[=a]"[i^]k or
   [=o]"l[-e]*[i^]k), a. [L. oleum oil: cf. F. ol['e]ique.]
   (Physiol.Chem.)
   Pertaining to, derived from, or contained in, oil; as, oleic
   acid, an acid of the acrylic acid series found combined with
   glyceryl in the form of olein in certain animal and vegetable
   fats and oils, such as sperm oil, olive oil, etc. At low
   temperatures the acid is crystalline, but melts to an oily
   liquid above 14[deg] C.
   [1913 Webster]