octahedron octahedron  /ˌɑk tə ˈhid rən/


  • (n) any polyhedron having eight plane faces


  1. The stone was a "Cape yellow" weighing 511 carats, a nearly perfect octahedron and one of the biggest diamonds ever found in South Africa.
  2. 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.
Word of the Day
tangible tangible
/ˈtæn dʒə bəl /