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From Longman Dictionary of Contemporary English
Related topics: Maths
polyhedronpol‧y‧he‧dron /ˌpɒlɪˈhiːdrən $ ˌpɑː-/ noun [countable] technical  HMa solid shape with many sides
Examples from the Corpus
polyhedronPositive form can be introduced into any polygon or polyhedron by regarding it as a closed skin subjected to internal expansion.
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