Ellipsoid

5 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Conoid \Co"noid\ (k[=o]"noid), n. [Gr. kwnoeidh`s conical;
     kw^nos cone + e'i^dos form: cf. F. cono["i]de.]
     1. Anything that has a form resembling that of a cone.
        [1913 Webster]
  
     2. (Geom.)


        (a) A solid formed by the revolution of a conic section
            about its axis; as, a parabolic conoid, elliptic
            conoid, etc.; -- more commonly called {paraboloid},
            {ellipsoid}, etc.
        (b) A surface which may be generated by a straight line
            moving in such a manner as always to meet a given
            straight line and a given curve, and continue parallel
            to a given plane. --Math. Dict.
            [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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 The Collaborative International Dictionary of English v.0.48 [gcide]:

  Ellipsoid \El*lip"soid\, Ellipsoidal \El`lip*soi"dal\, a.
     Pertaining to, or shaped like, an ellipsoid; as, ellipsoid or
     ellipsoidal form. Elliptic

From WordNet (r) 2.0 [wn]:

  ellipsoid
       adj : in the form of an ellipse [syn: {ellipsoidal}, {spheroidal},
              {non-circular}]
       n : a surface whose plane sections are all ellipses or circles;
           "the Earth is an ellipsoid"

From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:

  30 Moby Thesaurus words for "ellipsoid":
     ball, balloon, bladder, blob, boll, bolus, bubble, bulb, bulbil,
     bulblet, geoid, globe, globelet, globoid, globule, glomerulus, gob,
     gobbet, knob, knot, oblate spheroid, orb, orbit, orblet, pellet,
     prolate spheroid, rondure, sphere, spheroid, spherule