Decahemidecachoron

The decahemidecachoron, or duhd, is a nonconvex uniform polychoron that consists of 10 regular tetrahedra and 5 octahemioctahedra. 2 tetrahedra and 3 octahemioctahedra join at each vertex.

It is in the same regiment as the small prismatodecachoron.