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.
References in periodicals archive ?
Rhombic dodecahedra with 60[degree sign] face inclinations generate a 30.
Octahedral crystals produced up to four sundog-like halos, cuboctahedra made eight, and dodecahedra 12
First, it should be noted that the authors have not yet seen elongated, twinned dodecahedra of the fourth mineral of the sodalite family, lazurite.
Are there other minerals occurring in dodecahedra and reported to form such twins?
Common forms include dodecahedra and octahedra modified by cubic faces and rare trapezohedron faces.