Tetrasnub antipodic disdecachoron

The tetrasnub antipodic disdecachoron, or tesapdid, is a nonconvex uniform polychoron that consists of 10 icosahedra, 10 great icosahedra, 40+120 octahedra, and 60+120+120 tetrahedra. 1 icosahedron, 1 great icosahedron, 8 octahedra, and 10 tetrahedra join at each vertex.

This polychoron has ionic decachoric symmetry, with the icosahedra and great icosahedra acting as snub tetrahedra. It can be thought as a kind of sub-symmetrical faceting of the small stellated hecatonicosachoron.

It was discovered on October 17, 2021, by Polytope Discord user Galoomba.