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A solid figure with many plane faces, typically more than six.
- ‘Plato believed that atoms have the shapes of regular polyhedra: cubes, tetrahedrons, octahedrons, and so on.’
- ‘Kepler connected the planetary orbits with the five regular polyhedra, or Platonic solids.’
- ‘For example, fair dice don't have to be in the shape of regular polyhedra, such as cubes, icosahedra, and so on.’
- ‘The icosahedron is one of only five regular convex polyhedrons, the symmetric ‘Platonic solids’ that fascinated the ancient Greeks (the cube is another).’
- ‘He submitted his first paper on this topic then, encouraged by Legendre and Malus, he submitted a further paper on polygons and polyhedra in 1812.’
Late 16th century: from Greek poluedron, neuter (used as a noun) of poluedros many-sided.
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