Truncated small ditrigonary hexacosihecatonicosachoron

The truncated small ditrigonary hexacosihecatonicosachoron, or tissidtixhi, is a nonconvex uniform polychoron that consists of 600 truncated tetrahedra, 120 small ditrigonary icosidodecahedra, and 120 truncated great icosahedra. 1 small ditrigonary icosidodecahedron, 3 truncated great icosahedra, and 3 truncated tetrahedra join at each vertex. As the name suggests, it can be obtained by truncating the small ditrigonary hexacosihecatonicosachoron.

Related polychora
The truncated small ditrigonary hexacosihecatonicosachoron is the colonel of a regiment that also includes the truncated ditrigonary dishecatonicosachoron and the truncated great ditrigonary hexacosihecatonicosachoron. This regiment also includes the truncated dodeahedronary hexacosichoron, a compound of 25 truncated icositetrachora.