icositetrahedron

2 definitions found

icositetrahedron - Collaborative International Dictionary of English v.0.48 :

  Icositetrahedron \I`co*si*tet`ra*he"dron\, n. [Gr. ? twenty + ?,
     combining form of ? four + ? seat, base.] (Crystallog.)
     A twenty-four-sided solid; a tetragonal trisoctahedron or
     trapezohedron.
     [1913 Webster]

  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