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Tetrahedron
(redirected from tetrahedral)

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tetrahedron: see polyhedron polyhedron , closed solid bounded by plane faces; each face of a polyhedron is a polygon. A cube is a polyhedron bounded by six polygons (in this case squares) meeting at right angles.
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tetrahedron
1. a solid figure having four plane faces. A regular tetrahedron has faces that are equilateral triangles
2. any object shaped like a tetrahedron

tetrahedron [‚te·trə′hē·drən]
(crystallography)
An isometric crystal form in cubic crystals, in the shape of a four-faced polyhedron, each face of which is a triangle.
(mathematics)
A four-sided polyhedron.

Tetrahedron 

(or triangular pyramid), a polyhedron with four triangular faces, six edges, and four vertices. At each vertex three edges intersect. The regular tetrahedron (Figure 1) is one

Figure 1

of the five regular polyhedrons. If a is the length of an edge of a regular tetrahedron, the volume of the tetrahedron is Tetrahedron.



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Byline: ANI London, Aug 13 (ANI): Researchers at the Princeton University claim to have set a new record of packing the most tetrahedral - solid figures with four triangular faces - into a volume.
In addition, HyperMesh, Altair's product for finite element pre-processing, includes several new algorithms for tetrahedral, hexahedral, 'mesh flow' and mid-surface meshing.
The key is that a changing boundary between two layers passes through the inside of the original tetrahedral mesh, creating partitions into new finite-element shapes, but without altering the original finite elements.
 
 
 
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