oleaceous
/ˌəʊlɪˈeɪʃəs
/adjective Botany
Relating to or denoting plants of the olive family (Oleaceae).Considering the high diversity of laurophyllous Oleaceae in modern evergreen and mixed mesophytic forests and the common presence of oleaceous pollen in the fossil record it may be expected that cuticular analysis of laurophyllous leaf fossils will lead to the recognition of an increased number of oleaceous taxa in Tertiary leaf assemblages.
Origin
Mid 19th century: from modern Latin Oleaceae (plural), based on Latin olea 'olive tree', + -ous.