Noun
A solid bounded by twenty sides or faces.
Source: Webster's dictionaryAn icosahedron is used in the board game Scattergories to choose a letter of the alphabet. Source: Internet
Another classification uses the geometrical shape of their capsid (often a helix or an icosahedron ) or the virus's structure (e.g. presence or absence of a lipid envelope ). Source: Internet
A regular icosahedron is a gyroelongated pentagonal bipyramid and a biaugmented pentagonal antiprism in any of six orientations. Source: Internet
Construction This polyhedron can be constructed from an icosahedron with the 12 vertices truncated (cut off) such that one third of each edge is cut off at each of both ends. Source: Internet
Earth was associated with the cube, air with the octahedron, water with the icosahedron, and fire with the tetrahedron. Source: Internet
As it turns out, the icosahedron occupies less of the sphere's volume (60.54%) than the dodecahedron (66.49%). Source: Internet