Trapezohedron

3 definitions found

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

  Trapezohedron \Trap`e*zo*he"dron\, n. [NL., from trapezium + Gr.
     ? seat, base, fr. ? to sit.] (Crystalloq.)
     (a) A solid bounded by twenty-four equal and similar
         trapeziums; a tetragonal trisoctahedron. See the Note
         under {Trisoctahedron}.
     (b) A tetartohedral solid of the hexagonal system, bounded by


         six trapezoidal planes. The faces of this form are common
         on quartz crystals.
         [1913 Webster]

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

  Trisoctahedron \Tris*oc`ta*he"dron\, n. [Gr. ? thrice + FE.
     octahedron.] (Crystallog.)
     A solid of the isometric system bounded by twenty-four equal
     faces, three corresponding to each face of an octahedron.
     [1913 Webster]
  
     {Tetragonal trisoctahedron}, a trisoctahedron each face of
        which is a quadrilateral; called also {trapezohedron} and
        {icositetrahedron}.
  
     {Trigonal trisoctahedron}, a trisoctahedron each face of
        which is an isosceles triangle.
        [1913 Webster] Trispast

From WordNet (r) 2.0 [wn]:

  trapezohedron
       n : a polyhedron whose faces are trapeziums
       [also: {trapezohedra} (pl)]