Small dispinosnub prismatodisnub trishexacositrishexacosichoron

The small dispinosnub prismatodisnub trishexacositrishexacosichoron, or sidnaspid stextix, is a nonconvex uniform polychoron that consists of 600 small stellated dodecahedra, 600 great dodecahedra and 600 icosahedra (some of which lie in the same hyperplanes, forming 600 compounds of one of each), 4800 cubohemioctahedra (forming 2400 compounds of two), 600 icosidodecadodecahedra, 600 small rhombidodecahedra, 600 small dodecicosahedra, and 6000 triangular prisms.

One small stellated dodecahedron, one great dodecahedron and one icosahedron (two compounds), eight cubohemioctahedra (eight compounds), five icosidodecadodecahedra, five small rhombidodecahedra, five small dodecicosahedra, and five triangular prisms join at each vertex.

It can be obtained as the blend of 5 small capped dipentary hexacositetrishecatonicosachora and 5 small dipentary hecatonicosiprismatohexacosihecatonicosachora. In the process, some of the cubohemioctahedron cells blend out.

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