Grand 600-cell

The Grand 600-cell, also known as the Grand 600-cell honeycomb, is a type of polytopal structure in higher-dimensional geometry. The term generally refers to a specific configuration related to the 600-cell, which is a convex four-dimensional polytope, also known as a 4-dimensional regular simplex or a 600-cell polytope. The 600-cell itself has 600 tetrahedral cells, and it is one of the six regular convex 4-polytopes.