Small dispinosnub prismatosnubdisnub dishexacosidishexacosichoron

The small dispinosnub prismatosnubdisnub dishexacosidishexacosichoron, or sednasposid sadixdox, is a nonconvex uniform polychoron that consists of 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 (forming 600 compounds of one of each), 6000 triangular prisms, and 3600 pentagrammic prisms.

Two icosahedra (two compounds), eight cubohemioctahedra (eight compounds), five small dodecicosahedra and five small icosicosidodecahedra (ten compounds), five triangular prisms, and five pentagrammic prisms join at each vertex.

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