Small snubretrosnub prismatodisnub pentishexacosichoron

The small snubretrosnub prismatodisnub pentishexacosichoron, or sosirspidspox, is a nonconvex uniform polychoron that consists of 1200 great icosahedra (some of which lie in the same hyperplanes, forming 600 small retrosnub disoctahedra), 600 great dodecahedra, 2400 octahemioctahedra and 2400 cuboctahedra (forming 2400 compounds of one of each), 600 cubohemioctahedra (forming 120 great antirhombicosahedra), 600 icosidodecadodecahedra, 600 small ditrigonal dodecicosidodecahedra, and 6000 triangular prisms.

Two great icosahedra (two compounds), one great dodecahedron, four octahemioctahedra and four cuboctahedra (eight compounds), one cubohemioctahedron (one compound), five icosidodecadodecahedra, five small ditrigonal dodecicosidodecahedra, and five triangular prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary prismatohexacosihecatonicosachora and 5 small dipentary trishecatonicosihecatonicosihexacosichora. In the process, some of the octahemioctahedron and cuboctahedron cells blend out.

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