This polyhedron has seven faces, 14 vertexes, 21 edges, and a hole. Topologically, if it were smoothed out, it would be equivalent to a doughnut (or torus). You could describe as a toroidal ...

A 3D shape with all straight edges and flat faces is a polyhedron. Other 3D shapes with least one curved surface are not polyhedra. A 3D shape with regular polygonal faces, meeting at equal angles ...

Chemists have created a molecular polyhedron, a ground-breaking assembly that has the potential to impact a range of industrial and consumer products, including magnetic and optical materials.