Definition of heptahedron noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌheptəˈhiːdrən//
; NAmE NAmE//ˌheptəˈhiːdrən//
; BrE BrE//ˌheptəˈhedrən//
; NAmE NAmE//ˌheptəˈhedrən//
jump to other results
a solid figure with seven flat sides Word Origin late 17th cent.: from hepta- ‘seven’ + -hedron, on the pattern of words such as polyhedron.
See the Oxford Advanced American Dictionary entry: heptahedron