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  • noun

Words related to icosahedron

any polyhedron having twenty plane faces

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The fascination that arithmetic and geometry held for these thinkers is apparent from the way in which Plato, without any empirical knowledge, described the qualitative difference between the indivisible building blocks of the four elements, the atoms, as a quantitative difference: "There are therefore four kinds or atoms, each atom of fire is a tetrahedron, each atom of air an octahedron, each atom of water an icosahedron, each atom of earth a cube.
In the three dimensional Euclidean space, there are just five types of regular polyhedrons: a regular tetrahedron, cube, regular octahedron, regular dodecahedron and a regular icosahedron.
The buckminster fullerene is the most common form of fullerene measuring about 7 [Angstrom] in diameter with 60 carbon atoms arranged in a shape known as truncated icosahedrons (22).
Kepler knew that there were only five regular polyhedrons (solid figures whose faces are composed of identical polygons): tetrahedrons, cubes, octahedrons, dodecahedrons, and icosahedrons.
Others, known as icosahedrons or ``bird cages,'' have a distinct geometric design.