Platonic solid

Platonic solid

noun Geometry.
one of the five regular polyhedrons: tetrahedron, octahedron, hexahedron, icosahedron, or dodecahedron.

Origin:
1950–55

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Platonic solid
 
n
Also called (esp formerly): Platonic body any of the five possible regular polyhedra: cube, tetrahedron, octahedron, icosahedron, and dodecahedron
 
[C17: named after Plato1, who was the first to list them]

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