American English

Definition of pentahedron noun from the Oxford Advanced American Dictionary

 

pentahedron

 noun
noun
NAmE//ˌpɛntəˈhidrən//
 
, NAmE//ˌpentəˈhedrən//
 
(geometry)
 
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a solid shape with five flat sides
See the Oxford Advanced Learner's Dictionary entry: pentahedron