Small dispinosnub snub prismatosnub pentishexacosipentishecatonicosachoron

The small dispinosnub snub prismatosnub pentishexacosipentishecatonicosachoron, or sidansos pispoxphi, is a nonconvex uniform polychoron that consists of 1200 small stellated dodecahedra (some of which lie in the same hyperplanes, forming 600 pentagrammatic snub pseudodisoctahedra), 4800 cubohemioctahedra (forming 2400 compounds of two), 600 small dodecicosahedra, 600 rhombidodecadodecahedra, 600 small dodecicosidodecahedra, 3000 truncated tetrahedra (600 of which form 120 truncated chiricosahedra), and 3600 pentagrammic prisms.

Two small stellated dodecahedra (two compounds), eight cubohemioctahedra (eight compounds), five small dodecicosahedra, five rhombidodecadodecahedra, five small dodecicosidodecahedra, five truncated tetrahedra (one compound, four single), and five pentagrammic prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary hecatonicosiprismatohecatonicosihexacosichora and 5 small dipentary hexacositrishecatonicosihexacosichora. 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.