Chasmic cuboctachoron

The chasmic cuboctachoron or caco is a scaliform polychoron that consists of 16 cubes and 8 blends of 2 octagonal prisms. Two cubes and three blends of 2 octagonal prisms meet at each vertex.

It can be formed as a blend of a small spinoprismatotesseractioctachoron and an octagonal diorthoprism.

It has the same vertex figure as the small rhombihexahedral prism; the equilateral triangles still correspond to cubes, but the butterfly corresponds instead to a small rhombihexahedron and the isosceles triangles to octagonal prisms.

This polychoron is in a subregiment of sidpith, as it has its vertices and some but not all of its edges.