Icosahedral rotunda (EntityTopic, 15)
From Hi.gher. Space
The icosahedral rotunda is a CRF polychoron, icosahedron || enlarged icosahedron || truncated icosahedron. Its cells are one icosahedron, 20 truncated tetrahedra, 12 pentagonal pyramids and one truncated icosahedron. it can also be described as a truncated icosahedral pyramid.
History
This polytope was discovered by Marek14 by cutting the top off of a rectified 600-cell.