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octahedron

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.06 sec.
octahedron: see polyhedron polyhedron (pŏl'ēhē`drən), closed solid bounded by plane faces; each face of a polyhedron is a polygon .
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There were also crocheted versions of the five Platonic solids--the cube, the tetrahedron, the octahedron, the dodecahedron, and the icosahedron--as well as a bricklike fractal object called Menger's sponge.
Crafty geometry: mathematicians are knitting and crocheting to ... by Klarreich, Erica / Science News
Adjoining rectangular extensions symbolizing the four corners of the world provide additional stability and two smaller further extensions rise above the main octahedron.
Kizhi Island in the wilds of northern Russia houses a remarkable ... by Fagerstrom, Christina / The Architectural Review
The primary thesis in the Mysterium cosmographicum is that God created the (Copernican) universe to express the five platonic solids (the cube, tetrahedron, octahedron, icosahedron, and dodecahedron).
James R. Voelkel. The Composition of Kepler's Astronomia nova by Martens, Rhonda / Renaissance Quarterly
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