American English

Definition of polyhedron noun from the Oxford Advanced American Dictionary

 

polyhedron

 noun
noun
NAmE//ˌpɑliˈhidrən//
 
(pl. polyhedra
NAmE//ˌpɑliˈhidrə//
 
or polyhedrons)
(geometry)
 
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a solid shape with many flat sides, usually more than six
NAmE//ˌpɑliˈhidrəl//
 
adjective
See the Oxford Advanced Learner's Dictionary entry: polyhedron