ikosa
An ikosa is a term that can refer to several different concepts, primarily in mathematics and the study of crystals. In geometry, an ikosa is a misspelling or colloquial variation of "icosahedron," which is a polyhedron with 20 faces. The most common and regular form is the icosahedron, one of the five Platonic solids, characterized by 20 equilateral triangular faces, 30 edges, and 12 vertices.
The term ikosa also appears in crystallography. An ikosahedral structure, or icosahedral symmetry, describes arrangements of
In the field of virology, the protein shells of many viruses, known as capsids, are often icosahedral