Grand retrosphenoverted hecatonicosihexacosihecatonicosachoron

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

It is in the same regiment as the small rhombated grand hexacosichoron.