The Collaborative International Dictionary of English v.0.48:

Olea \O"le*a\, prop. n. [L. olive. See Olive.] (Bot.)
   A genus of trees including the olive.
   [1913 Webster]

   Note: The Chinese Olea fragrans, noted for its fragrance,
         and the American devilwood (Olea Americana) are now
         usually referred to another genus (Osmanthus).
         [1913 Webster]