4 faces (and edges) meet at every vertex.

So the dual polyhedron is the cube.

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.

© Webster 1913.

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