Regular 4-polytope
Four-dimensional analogues of the regular polyhedra in three dimensions / From Wikipedia, the free encyclopedia
In mathematics, a regular 4-polytope or regular polychoron is a regular four-dimensional polytope. They are the four-dimensional analogues of the regular polyhedra in three dimensions and the regular polygons in two dimensions.
There are six convex and ten star regular 4-polytopes, giving a total of sixteen.