icosahedron

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Related to icosahedra: Icosahedral symmetry
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Words related to icosahedron

any polyhedron having twenty plane faces

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The designed structures are made of two different engineered proteins, present in 60 copies each, which self-assemble into icosahedra.
2001): "Self-assembly of regular hollow icosahedra in salt-free catanionic solutions", Nature no 411 (junio), pp.
Icosahedra are symmetrical about their centers allowing full range attachment of the virus particle to a host cell without regard to virion orientation.
Contrast Nixon's obliviousness with the detailed account of Leonardo's latest invention, something called a due rote: "You turned the pedals with your feet, which turned the big cog wheel, which pulled the chain forward, cog by cog, causing the smaller wheel to turn the hind rota, thereby propelling the whole machine forward" (4); or compare it to Leonardo's joy at what the morning light does to his studio's clutter: "Meadow grass from Fiesole, icosahedra, cogs, gears, plaster, maps, lutes, brushes, an adze, magic squares, pigments, a Roman head Brunelleschi and Donatello brought him from their excavations, the skeleton of a bird: how beautifully the Tuscan light gave him his things again every morning, even if the kite had been in his sleep" (3).
Believing movement to be a fundamental medium for child development, Laban created an educational form of dance, using interweaved icosahedra to represent directions and qualities of movement, which could be used for different physical and emotional purposes.