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Meaning of Platonic solid

Platon'ic sol'id

Pronunciation: [key]
— Geom. Geom.
  1. one of the five regular polyhedrons: tetrahedron, octahedron, hexahedron, icosahedron, or dodecahedron.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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