Small disnub prismatodisnub dishexacosidishexacosichoron

The small disnub prismatodisnub dishexacosidishexacosichoron, or sadspid sedoxdix, 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 icosahedra, 4800 cuboctahedra (forming 2400 compounds of two), 600 small rhombidodecahedra, and 6000 triangular prisms.

Two great icosahedra (two compounds), one icosahedron, eight cuboctahedra (six compounds), five small rhombidodecahedra, and five triangular prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary hecatonicosihexacosidishecatonicosachora and 5 small dipentary prismatohexacosihecatonicosachora.

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