Deltohedron

• (n.) A solid bounded by twelve quadrilateral faces. It is a hemihedral form of the isometric system, allied to the tetrahedron.
Found on http://thinkexist.com/dictionary/meaning/deltohedron/

Deltohedron

Del`to·he'dron noun [ Greek de`lta , the letter Δ + 'e`dra seat, base.] (Crystallog.) A solid bounded by twelve quadrilateral faces. It is a hemihedral form of the isometric system, allied to the tetrahedron.
Found on http://www.encyclo.co.uk/webster/D/31
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