octahedron

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An octahedron

Alternative forms

Etymology

From Ancient Greek ὀκτώ (oktṓ, eight) + ἕδρα (hédra, seat).

Pronunciation

  • (file)

Noun

octahedron (plural octahedra or octahedrons)

  1. (geometry) a polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids.

Derived terms

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