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What (who) is Octahedron - definition

POLYHEDRON WITH 8 FACES

Square bipyramids; Octahedral; Octahedra; Regular octahedron; Tetratetrahedron; Triangular antiprism; Square dipyramid; Rectified tetrahedron; Octohedral; Oct (geometry); Rectified 3-simplex; 3-orthoplex; Trigonal antiprism; Birectified Cube; Birectified cube; 3-cross; 3-cross-polytope; 0 11 polytope; Octohedra; 8-hedron; Square bipyramid; Octohedron; Spherical octahedron; Order-4 triangular tiling

Octahedron

·noun A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles.

octahedron

[??kt?'hi:dr?n, -'h?d-]

¦ noun (plural octahedra -dr? or octahedrons) a three-dimensional shape having eight plane faces, in particular a regular solid figure with eight equal triangular faces.

Derivatives

octahedral adjective

Origin

C16: from Gk oktaedron, neut. (used asnoun) of oktaedros 'eight-faced'.

Octahedron

In geometry, an octahedron (plural: octahedra, octahedrons) is a polyhedron with eight faces, twelve edges, and six vertices. The term is most commonly used to refer to the regular octahedron, a Platonic solid composed of eight equilateral triangles, four of which meet at each [regular octahedron is the dual polyhedron] of a [[cube.

https://en.wikipedia.org/wiki/Octahedron

Wikipedia

Octahedron

In geometry, an octahedron (plural: octahedra, octahedrons) is a polyhedron with eight faces. The term is most commonly used to refer to the regular octahedron, a Platonic solid composed of eight equilateral triangles, four of which meet at each vertex.

A regular octahedron is the dual polyhedron of a cube. It is a rectified tetrahedron. It is a square bipyramid in any of three orthogonal orientations. It is also a triangular antiprism in any of four orientations.

An octahedron is the three-dimensional case of the more general concept of a cross polytope.

A regular octahedron is a 3-ball in the Manhattan (ℓ₁) metric.

https://en.wikipedia.org/wiki/Octahedron

Examples of use of Octahedron

1. "The large–sized gemstone is octahedron in shape and of very good quality according to a third party assessor," the statement to the London stock exchange said.