polyhedra
Noun
The word is derived from polyhedron
Meaning
of Polyhedron
Source: Webster's dictionaryAnagrams
Examples
A concave bipyramid has a concave interior polygon. : The face-transitive regular bipyramids are the dual polyhedra of the uniform prisms and will generally have isosceles triangle faces.
A complex polyhedron is mathematically more closely related to configurations than to real polyhedra.
Alexander Borisov, Mark Dickinson, and Stuart Hastings, "A congruence problem for polyhedra", American Mathematical Monthly 117, March 2010, pp. 232-249.
Altogether there are nine regular polyhedra.
Aside from a rectangular box, orthogonal polyhedra are nonconvex.
Besides the regular polyhedra, there are many other examples.