Noun
zonohedron (plural zonohedra)
(geometry) A special case of convex polyhedron, in which every face of the polyhedron is a polygon with point symmetry.
In Conway polyhedron notation it can be seen as gT, a gyro tetrahedron. : Rhombic dodecahedron Rhombic dodecahedron The rhombic dodecahedron is a zonohedron with twelve rhombic faces and octahedral symmetry. Source: Internet
It is also unique among the Platonic solids in having faces with an even number of sides and, consequently, it is the only member of that group that is a zonohedron (every face has point symmetry). Source: Internet
Zonohedra main A zonohedron is a convex polyhedron where every face is a polygon with inversion symmetry or, equivalently, symmetry under rotations through 180°. Source: Internet