The Collaborative International Dictionary of English v.0.48:
Prolate \Pro"late\, a. [L. prolatus, used as p. p. of proferre
to bring forth, to extend; pro + latus, p. p. See Pro-, and
Stretched out; extended; especially, elongated in the
direction of a line joining the poles; as, a prolate
spheroid; -- opposed to oblate.
Prolate cycloid. See the Note under Cycloid.
Prolate ellipsoid or Prolate spheroid (Geom.), a figure
generated by the revolution of an ellipse about its major
axis. Contrasted with oblate spheroid. See Ellipsoid of
revolution, under Ellipsoid.