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2 definitions found
 for Ellipsoid of revolution
From The Collaborative International Dictionary of English v.0.48 :

  Ellipsoid \El*lip"soid\, n. [Ellipse + -oid: cf. F. ellipsoide.]
     (Geom.)
     A solid, all plane sections of which are ellipses or circles.
     See Conoid, n., 2
     (a) .
         [1913 Webster]
  
     Note: The ellipsoid has three principal plane sections, a, b,
           and c, each at right angles to the other two, and each
           dividing the solid into two equal and symmetrical
           parts. The lines of meeting of these principal sections
           are the axes, or principal diameters of the ellipsoid.
           The point where the three planes meet is the center.
           [1913 Webster]
  
     Ellipsoid of revolution, a spheroid; a solid figure
        generated by the revolution of an ellipse about one of its
        axes. It is called a prolate spheroid, or prolatum, when
        the ellipse is revolved about the major axis, and an
        oblate spheroid, or oblatum, when it is revolved about the
        minor axis. Ellipsoid

From WordNet (r) 3.0 (2006) :

  ellipsoid of revolution
      n 1: a shape that is generated by rotating an ellipse around one
           of its axes; "it looked like a sphere but on closer
           examination I saw it was really a spheroid" [syn:
           spheroid, ellipsoid of revolution]

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