
1) Cube 2) Rhombohedron
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https://www.crosswordclues.com/clue/hexahedron

1) Polyhedron
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https://www.crosswordclues.com/clue/hexahedron

A hexahedron (plural: hexahedra) is any polyhedron with six faces. A cube, for example, is a regular hexahedron with all its faces square, and three squares around each vertex. There are seven topologically distinct convex hexahedra, one of which exists in two mirror image forms. (Two polyhedra are `topologically distinct` if they have intrinsic.....
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http://en.wikipedia.org/wiki/Hexahedron

• (n.) A solid body of six sides or faces.
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http://thinkexist.com/dictionary/meaning/hexahedron/

A polyhedron with six faces. A regular hexahedron, with all its faces perfect squares, is a cube.
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http://www.daviddarling.info/encyclopedia/H/hexahedron.html
Hex`a·he'dron noun ;
plural English
Hexahedrons , Latin
Hexahedra . [
Hexa- + Greek ... seat, base, from ... to sit: confer French
hexaèdre .]
(Geom.) A solid body of six sides or faces.
Regular hexahedron ,
a hexagon having six equal squares f...
Found on http://www.encyclo.co.uk/webster/H/41
A hexahedron is a figure having six faces, or a solid bounded by six planes. The term cube is now generally applied to the regular hexahedron.
Found on http://www.probertencyclopaedia.com/browse/GH.HTM
[n] - any polyhedron having six plane faces
Found on http://www.webdictionary.co.uk/definition.php?query=hexahedron
A polyhedron having 6 faces. The cube is a regular hexahedron. See also: Polyhedral.
Found on https://www.encyclo.co.uk/local/20687
No exact match found.