Great retrosphenoverted hexacosidishecatonicosachoron

The great retrosphenoverted hexacosidishecatonicosachoron, or grawvixady, is a nonconvex uniform polychoron that consists of 600 truncated tetrahedra, 120 icosidodecahedra, and 120 great icosicosidodecahedra. 1 icosidodecahedron, 2 truncated tetrahedra, and 2 great icosicosidodecahedra join at each vertex.

It is in the same regiment as the great sphenoverted ditrigonal trishecatonicosachoron.