1) Figure with 20 faces 2) Polyhedron 3) Solid figure having 20 faces
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In geometry, an icosahedron (n or n) is a polyhedron with 20 triangular faces, 30 edges and 12 vertices. A regular icosahedron with identical equilateral faces is often meant because of its geometrical significance as one of the five Platonic solids. It has five triangular faces meeting at each vertex. It can be represented by its vertex figure as...
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http://en.wikipedia.org/wiki/Icosahedron
solid with twenty plane faces
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• (n.) A solid bounded by twenty sides or faces.
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(from the article `cluster`) ...Waals forces or by other simple forces that depend only on the distance between each pair of atoms have unusual stability when the cluster has ... ...and is rapidly decomposed both by water and even by the grease used to lubricate the vacuum equipment employed in its preparation. Closed cages ... ...di...
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http://www.britannica.com/eb/a-z/i/5
A polyhedron with 20 faces. A regular icosahedron has faces that are all equilateral triangles, and is one of the five Platonic solids. The length from vertex to opposing vertex of a regular icosahedron is 5
1/4 f
1/2 d where f (phi) is the golden ...
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A geometrical shape occurring in many virus particles, with 20 triangular faces and 12 corners. ... (09 Oct 1997) ...
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Twenty sided polyhedron; all sides are equidimensional. Minerals shaped as icosahedrons belong to the isometric system.
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A geometrical shape occurring in many virus particles, with 20 triangular faces and 12 corners.
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I`co·sa·he'dron noun [ Greek ...; ... twenty + ... seat, base, from ... to sit.]
(Geom.) A solid bounded by twenty sides or faces.
Regular icosahedron ,
one of the five regular polyhedrons, bounded by twenty equilateral triangules. Five triangles meet to form each solid angle of the ...
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An icosahedron is a solid with twenty sides or faces. A regular icosahedron is one of the five regular polyhedrons, bounded by twenty equilateral triangles. Five triangles meet to form each solid angle of the polyhedron.
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[n] - any polyhedron having twenty plane faces
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A 20 sided solid.
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a solid figure having 20 faces.
Found on https://www.infoplease.com/dictionary/icosahedron
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