Small dispinosnub prismatodisnub hexacosipentishexacosichoron

The small dispinosnub prismatodisnub hexacosipentishexacosichoron, or sadinspidos xopex, is a nonconvex uniform polychoron that consists of 600 small stellated dodecahedra, 1200 icosahedra (some of which lie in the same hyperplanes, forming 600 snub disoctahedra), 4800 cubohemioctahedra (forming 2400 compounds of two), 600 small dodecicosahedra and 600 small icosicosidodecahedra, 600 small rhombidodecahedra, and 6000 triangular prisms.

One small stellated dodecahedron, two icosahedra (two compounds), eight cubohemioctahedra (eight compounds), five small dodecicosahedra and five small icosicosidodecahedra (ten compounds), five small rhombidodecahedra, and five triangular prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary hecatonicosiprismatohexacosihecatonicosachora and 5 small dipentary hecatonicosihexacositrishecatonicosachora. 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.