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.

icosahedron

20-facteted sphere, e.g. verruca virus
References in periodicals archive ?
Analogically, examine the relationship between the number of faces and vertices of a regular dodecahedron and a regular icosahedron.
Many display the 20 triangular faces of an icosahedron.
of platonic solids: dodecahedrons and icosahedrons that have epitomized human conception on an abstract plane since the first millennium BCE.