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From: Webster's Revised Unabridged Dictionary (1913)

 Pro·late a.  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.