polyhedron
/ˌpɒlɪˈhiːdrən
/noun (plural polyhedra /ˌpɒlɪˈhiːdrə/ or polyhedrons) Geometry
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.
- The icosahedron is one of only five regular convex polyhedrons, the symmetric ‘Platonic solids’ that fascinated the ancient Greeks (the cube is another).
Derivatives
polyhedral
/ adjective ...- The particles may have any shape or size, but they are generally spherical, ellipsoidal, polyhedral, or irregular in shape.
- And the sphere that houses the new Hayden Planetarium is both beautiful and astrophysically relevant - something that cannot be said of pyramids, cubes, or other polyhedral forms.
- Microscopically, the lesion consisted of stellate to polyhedral cells distributed singly and arranged in single or multiple layers around small vascular channels and deposited in an abundant myxoid matrix.
polyhedric
- Limited-complexity polyhedric methods are presented for estimating the parameters of a linear model from bounded-error data.
- The polyhedric method was invented by Paul Feautrier of the PRiSM laboratory of University of Versailles (France).
Origin
Late 16th century: from Greek poluedron, neuter (used as a noun) of poluedros 'many-sided'.