• (British) IPA: /ˌdəʊdɛkəˈhiːdɹən/, /ˌdəʊdɪkəˈhiːdɹən/
  • (America) IPA: /ˌdoʊdɛkəˈhiːdɹən/

dodecahedron (plural dodecahedrons or dodecahedra)

  1. (geometry) A polyhedron with twelve faces; the regular dodecahedron has regular pentagons as faces and is one of the Platonic solids.
    • 1707, Thomas Blount, Glossographia Anglicana Nova: Or, A Dictionary, Interpreting Such Hard Words, D. Brown, heading [ DO–DO],
      Dodecahedron, (Gr.) in Geometry, is a solid Figure of 12 Sides or Faces that are regular Pentagons, it is one of the Platonick or Regular Bodies.
    Synonyms: duodecahedron

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