icosahedron

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icosahedron

(ī-kō″să-hē′drŏn, kŏs″) [Gr. eikosaedron]
A nearly spherical structure made of 20 identical subunits linked at 12 symmetrical corners. Each subunit is an equilateral triangle. Several viruses, including the human immunodeficiency virus (HIV), are icosahedral.
References in periodicals archive ?
5a, 5b, 5c), or the duality of regular dodecahedrons and a regular icosahedron (Fig.
of platonic solids: dodecahedrons and icosahedrons that have epitomized human conception on an abstract plane since the first millennium BCE.
Four or more of these icosahedrons are bound together to a molecule of porphyrin, an iron-containing molecule that remains preferentially incancer cells.
The structure is similar to the cold virus--both are icosahedrons, with 60 copies each of four proteins.