The Collaborative International Dictionary of English v.0.48:

Olivary \Ol"i*va*ry\, a. [L. olivarius belonging to olives, fr.
   oliva an olive: cf. F. olivaire.] (Anat.)
   Like an olive.
   [1913 Webster]

   Olivary body (Anat.), an oval prominence on each side of
      the medulla oblongata; -- called also olive.
      [1913 Webster]