[ ˌpɒlɪ'hi:drən , -'hɛd- ]
■ noun ( plural polyhedra -drə or ~s ) Geometry a solid figure with many plane faces, typically more than six.
Derivatives
polyhedral adjective
polyhedric adjective
Origin
C16: from Gk poluedron , neut. of poluedros 'many-sided'.