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- noun geometry Any one of the following five
polyhedra: the regular tetrahedron, the cube, the regular octahedron, the regular dodecahedronand the regular icosahedron.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent
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Named after the Greek philosopher Plato, who wrote about these solids in his treatise Timaeus.
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