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Definitions:
Noun
regular polyhedron
regular convex solid
regular convex polyhedron
Platonic body
Platonic solid
ideal solid
Definition: any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent
Definition: Any of five convex polyhedra with congruent regular polygonal faces, which have a high degree of symmetry and have been studied since antiquity.