Great retrosphenoverted hecatonicosihexacosihecatonicosachoron

The great retrosphenoverted hecatonicosihexacosihecatonicosachoron, or grawv hixhi, is a nonconvex uniform polychoron that consists of 600 truncated tetrahedra, 120 great icosidodecahedra, and 120 icosidodecadodecahedra. 1 great icosidodecahedron, 2 truncated tetrahedra, and 2 icosidodecadodecahedra join at each vertex.

It is in the same regiment as the small rhombated great grand hecatonicosachoron.