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

paraboloid \parab"oloid\ -loid, n. parabola + -oid: cf. f.
   parabolo"ide. geom.
   the solid generated by the rotation of a parabola about its
   axis; any surface of the second order whose sections by
   planes parallel to a given line are parabolas.
   1913 webster

   note: the term paraboloid has sometimes been applied also to
         the parabolas of the higher orders. --hutton.
         1913 webster

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

conoid \co"noid\ k=o"noid, n. gr. kwnoeidh`s conical;
   kw^nos cone + e'i^dos form: cf. f. cono"ide.
   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
see also:
paraboloid ellipsoid 

[3] : WordNet (r) 2.0

paraboloid
     n : a surface having parabolic sections parallel to a single
         coordinate axis and elliptic sections perpendicular to
         that axis

Paraboloid >> P Words
Paraboloid, definition of term: Paraboloid
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