Hypertext Webster Gateway: "octahedron"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Octahedron \Oc`ta*he"dron\, n. [Gr.?, fr. ? eight-side; ? (for ?
eight) + ? seat, base, from ? to sit.] (Geom.)
A solid bounded by eight faces. The regular octahedron is
contained by eight equal equilateral triangles.
From WordNet (r) 1.7 (wn)
octahedron
n : any polyhedron having eight plane faces
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