Icosahedra | definition of icosahedra by Medical dictionary
icosahedron (redirected from icosahedra)
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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
He purified the proteins from the bacteria and developed new screening methods to determine which ones were forming icosahedra
Here the icosahedra
l motif has approximate symmetry operations that are not present in the cubic lattice.
also have locations around which there is threefold or twofold symmetry.