(ˌəʊlɪˈeɪʃəs) adj (Botany) of, relating to, or belonging to the Oleaceae, a family of trees and shrubs, including the ash, jasmine, privet, lilac, and olive[C19: via New Latin from Latin olea olive; see also oil]Thesaurus
Adj.
1.
oleaceous - of or pertaining to or characteristic of trees or shrubs of the olive family