prolate spheroid

from The Collaborative International Dictionary of English v.0.48

Spheroid \Sphe"roid\, n. [L. spheroides ball-like, spherical,
   Gr. ???; ???? sphere + e'i^dos form: cf. F. sph['e]ro["i]de.]
   A body or figure approaching to a sphere, but not perfectly
   spherical; esp., a solid generated by the revolution of an
   ellipse about one of its axes.
   [1913 Webster]

   {Oblate spheroid}, {Prolate spheroid}. See {Oblate},
      {Prolate}, and {Ellipsoid}.
      [1913 Webster]

from 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
   {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]