Great dodecahemidodecahedron

The great dodecahemidodecahedron, or gidhid, is a quasiregular polyhedron and one of 10 uniform hemipolyhedra. It consists of 12 pentagrams and 6 central decagrams, with two of each joining at a vertex.

It is notable as the only one of the 53 non-convex, non-regular, and non-prismatic uniform polyhedra to contain exclusively star polygons.