polyhedron

If we make a polyhedron out of clay, mark the edges with a Sharpie, and roll it into a ball, the faces and edges become curved but their number doesn’t change.

Synacral, sin-ak′ral, adj. having a common vertex, as faces of a polyhedron.

Crime, he admitted, is a very complex phenomenon; it is a sort of polyhedron, of which every one sees a special side.

"Polyhedron" is from the Greek polys (many) and hedra (seat).

The points thus obtained are evidently the vertices of a polyhedron with plane faces.

In the first place, each of these figures may be conceived as an orthogonal projection of a closed plane-faced polyhedron.