Icosahedron

2 definitions found

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

  Icosahedron \I`co*sa*he"dron\, n. [Gr. ?; ? twenty + ? seat,
     base, fr. ? to sit.] (Geom.)
     A solid bounded by twenty sides or faces.
     [1913 Webster]
  
     {Regular icosahedron}, one of the five regular polyhedrons,


        bounded by twenty equilateral triangules. Five triangles
        meet to form each solid angle of the polyhedron.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  icosahedron
       n : any polyhedron having twenty plane faces
       [also: {icosahedra} (pl)]