a. [ L. prolatus, used as p. p. of proferre to bring forth, to extend; pro + latus, p. p. See Pro-, and Tolerate. ] Stretched out; extended; especially, elongated in the direction of a line joining the poles; as, a prolate spheroid; -- opposed to oblate. [ 1913 Webster ]

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. [ 1913 Webster ]

v. t. To utter; to pronounce. [ Obs. ] “Foun-der-ed; prolate it right.” B. Jonson. [ 1913 Webster ]