dodecahedron

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dodecahedron:

see polyhedronpolyhedron
, closed solid bounded by plane faces; each face of a polyhedron is a polygon. A cube is a polyhedron bounded by six polygons (in this case squares) meeting at right angles.
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dodecahedron

[dō‚dek·ə′hē‚drən]
(mathematics)
A polyhedron with 12 faces.