Tet`ra*he"dral (?), a. [See Tetrahedron.] 1. Having, or composed of, four sides.

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.

Tet`ra*he"dral (?), a. [See Tetrahedron.] 1. Having, or composed of, four sides.

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.

• in the shape of a tetrahedron
  
• having four faces, four apices and six edges