in geometry, the great inverted snub icosidodecahedron (or great vertisnub icosidodecahedron) is a uniform star polyhedron, indexed as u. it is given a schläfli symbol sr{5/3,3}, and coxeter-dynkin diagram . in the book "polyhedron models" by magnus wenninger, the polyhedron is misnamed "great snub icosidodecahedron", and vice versa.