Great diretrosnub heptishexacosichoron

The great diretrosnub heptishexacosichoron, or gedroshox, is a nonconvex uniform polychoron that consists of 600 small stellated dodecahedra and 600 great icosahedra (falling into pairs in the same hyperplanes, forming 600 compounds of one of each), 600 icosahedra, 4800 octahemioctahedra (forming 2400 compounds of two), 600 icosidodecadodecahedra, 600 great ditrigonal dodecicosidodecahedra, 600 great dodecicosidodecahedra, and 600 truncated great icosahedra.

One small stellated dodecahedron and one great icosahedron (two compounds), one icosahedron, eight octahemioctahedra (eight compounds), five icosidodecadodecahedra, five great ditrigonal dodecicosidodecahedra, five great dodecicosidodecahedra, and five truncated great icosahedra join at each vertex.

It can be obtained as the blend of 5 great dipentary trishecatonicosihecatonicosihexacosichora and 5 great invertidipentary hecatonicosihexacosidishecatonicosachora. In the process, some of the octahemioctahedron cells blend out.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the great diretrosnub disnub decahecatonicosadishexacosichoron.