trisoctahedron

noun tris·oc·ta·he·dron \ˌtri-ˌsäk-tə-ˈhē-drən\

Definition of TRISOCTAHEDRON

: a solid (as a crystal) having 24 congruent faces meeting on the edges of a regular octahedron

Greek tris thrice + English octahedron — more at ter-

First Known Use: circa 1847

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