Retrofrustary hexacositrishecatonicosachoron

The retrofrustary hexacositrishecatonicosachoron, or raffixthi, is a nonconvex uniform polychoron that consists of 600 octahedra, 120 dodecadodecahedra, 120 small dodecicosidodecahedra, and 120 small ditrigonal dodecicosidodecahedra. 1 octahedron, 1 dodecadodecahedron, 2 small dodecicosidodecahedra, and 2 small ditrigonal dodecicosidodecahedra join at each vertex.

It is in the same regiment as the antifrustary hexacositrishecatonicosachoron.