Great diretrosnub pentishexacosidishexacosichoron

The great diretrosnub pentishexacosidishexacosichoron, or gadrospixdox, is a nonconvex uniform polychoron that consists of 1200 great icosahedra (falling into pairs in the same hyperplanes, forming 600 small retrosnub disoctahedra), 600 icosahedra and 600 great dodecahedra (forming 600 compounds of one of each), 4800 octahemioctahedra (forming 2400 compounds of two), 600 great dodecicosahedra, 600 icosidodecadodecahedra, and 600 great dodecicosidodecahedra.

Two great icosahedra (two compounds), one icosahedron and one great dodecahedron (two compounds), eight octahemioctahedra (eight compounds), five great dodecicosahedra, five icosidodecadodecahedra, and five great dodecicosidodecahedra join at each vertex.

It can be obtained as the blend of 5 great dipentary dishecatonicosihexacosihecatonicosachora and 5 great dipentary tetrishecatonicosihexacosichora. 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.