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icosahedron n. 二十面體 二十面體 icosahedron n 1: any polyhedron having twenty plane faces 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]
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