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Etymology edit

From New Latin polyedron, from Ancient Greek πολύεδρος (polúedros, having many seats), from πολυ- (polu-, many) + ἕδρα (hédra, seat); compare French polyèdre. By surface analysis, poly- +‎ -hedron.

Pronunciation edit

  • (UK) enPR: pŏlēhē'drən, IPA(key): /pɒliˈhiːdɹən/
  • (file)
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Noun edit

polyhedron (plural polyhedra or polyhedrons)

  1. (geometry) A solid figure with many flat faces and straight edges.
    • 1966, Norman W. Johnson, “Convex Polyhedra with Regular Faces”, in Canadian Journal of Mathematics, volume XVIII, number I, Toronto: University of Toronto Press, page 181:
      Of the convex polyhedra with regular faces, the only ones that have tetrahedral, octahedral, or icosahedral symmetry are the Platonic and Archimedean solids.
  2. (optics) A polyscope, or multiplying glass.

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See also Thesaurus:polyhedron

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