Tet`ra*he"dral (?), a. [See Tetrahedron.]


Having, or composed of, four sides.

2. Crystallog. (a)

Having the form of the regular tetrahedron.


Pertaining or related to a tetrahedron, or to the system of hemihedral forms to which the tetrahedron belongs.

Tetrahedral angle Geom., a solid angle bounded or inclosed by four plane angles.


© Webster 1913.

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