Tetrahedral angle
Tetrahedral Tet`ra*he"dral, a. [See {Tetrahedron}.] 1. Having, or composed of, four sides. [1913 Webster]

2. (Crystallog.) (a) Having the form of the regular tetrahedron. (b) Pertaining or related to a tetrahedron, or to the system of hemihedral forms to which the tetrahedron belongs. [1913 Webster]

{Tetrahedral angle} (Geom.), a solid angle bounded or inclosed by four plane angles. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • tetrahedral angle — noun : a polyhedral angle of four faces …   Useful english dictionary

  • Tetrahedral — Tet ra*he dral, a. [See {Tetrahedron}.] 1. Having, or composed of, four sides. [1913 Webster] 2. (Crystallog.) (a) Having the form of the regular tetrahedron. (b) Pertaining or related to a tetrahedron, or to the system of hemihedral forms to… …   The Collaborative International Dictionary of English

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