Polyhedron: nm and adj. (word coming from the Greek poluedros; poly- and -hedron).
Solid limited by a finite number of plane polygons or faces.
Convex polyhedron.
Regular polyhedron (cube, parallelepiped, pyramid).
Polyhedron (concave) with star faces.
Adjective: Polyhedron angle, formed by the faces of a polyhedron....
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