The Collaborative International Dictionary of English v.0.48:

Oblate \Ob*late"\, a. [L. oblatus, used as p. p. of offerre to
   bring forward, offer, dedicate; ob (see Ob-) + latus borne,
   for tlatus. See Tolerate.]
   [1913 Webster]
   1. (Geom.) Flattened or depressed at the poles; as, the earth
      is an oblate spheroid.
      [1913 Webster]

   2. Offered up; devoted; consecrated; dedicated; -- used
      chiefly or only in the titles of Roman Catholic orders.
      See Oblate, n.
      [1913 Webster]

   Oblate ellipsoid or Oblate spheroid (Geom.), a solid
      generated by the revolution of an ellipse about its minor
      axis; an oblatum. Contrasted with prolate spheroid. See
      Ellipsoid of revolution, under Ellipsoid.
      [1913 Webster]