The Collaborative International Dictionary
Polyhedral angle
Polyhedral \Pol`y*he"dral\, Polyhedrical \Pol`y*hed"ric*al\, a. [See Polyhedron.] (Geom.) Having many sides, as a solid body.
Polyhedral angle, an angle bounded by three or more plane angles having a common vertex.
WordNet
polyhedral angle
n. the space enclosed by three or more planes that intersect in a vertex