octahedron : Definition, Usages, News and More
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- n any polyhedron having eight plane faces
- The stone was a "Cape yellow" weighing 511 carats, a nearly perfect octahedron and one of the biggest diamonds ever found in South Africa.
- But Fuller insists that with this mast combined with his frame of tetrahedron-octahedron combinations which he calls the "octet truss," he could bridge the Grand Canyon itself.