Octahemihexadecachoron

The octahemihexadecachoron, or oh, is a nonconvex uniform polychoron that consists of 8 regular octahedra and 8 octahemioctahedra. 2 octahedra and 4 octahemioctahedra join at each vertex.

It is in the same regiment as the regular icositetrachoron.