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octahedron

octahedron

1 8.2
A solid shape with eight flat triangle faces
  • noun
  • /ˌɑkˈteɪhɪdrən/
  • Specialized
translation icon : octaedro
  • So there's octahedron, extrahedron through tetrahedrons, dolcahedron, icosahedron.

So in the the fire in the middle is actually an octahedron.

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Examples

  • So maybe let's do a higher dimensional version of the octahedron number of vertices.

  • Like octahedrons essentially kind of this mega octahedron.

  • So it's an octahedron of void place.

  • So this is an octahedron twisted from one balloon.

  • Jahn-Teller Effect: Elongation of the Octahedron Box 2.

    Academic text (2004)
  • This new edge now serves as an edge that subdivides this octahedron into four tetrahedron.

  • It's got these iron octahedra, which I showed before, and the tetrahedra are phosphate groups.

  • The octahedra have iodine sort of oxygen and at high temperature we have the the octahedra all untilted.

  • These activating light-energy downloads will be received primarily through the major Phi Pyramidal octahedron energies and structures in the southern hemisphere in 2013.

    Blog text (2)
  • The model of the crystal structure is shaped like an octahedron with eight triangular faces.

Synonyms

regular octahedron
vsoctahedron
  • Specialized
8.4

A solid with eight identical triangle faces and the same angles

is the general eight faced solid that does not require identical faces or angles

Compounds

regular octahedron
  • Specialized
8.4

A solid with eight identical triangle faces and the same angles

How Many Faces

icosahedron
  • Specialized
1 9.9
dodecahedron
  • Specialized
1 9.6
decahedron
  • Specialized
9.1
octahedron
  • Specialized
1 8.2
cube
130 1.0
tetrahedron
  • Specialized
2 7.6

Surface Forms

octahedron singular
octahedra plural

Morphology

octahedron = octa + hedron

The numeric combining form 'octa-' (eight) is fairly recognizable, but 'hedron' is a technical combining form meaning 'face' that is not familiar to average learners, so the whole word is only partially transparent.

Etymology

The word octahedron comes from Greek parts octa- meaning 'eight' and -hedron meaning 'face' or 'side'. So an octahedron is a three-dimensional shape with eight flat faces, like an octagon (which has eight sides) but in 3D.