| ̷ ̷ ̷ ̷|hēdrəl adjective
Etymology: New Latin tetrahedr on + English -al
1. : of or relating to a tetrahedron : having or made up of four sides
2.
a. : having the form of the regular tetrahedron
b. : relating to a tetrahedron or the system of hemihedral forms to which the tetrahedron belongs
c. : having the symmetry of a tetrahedron
• tet·ra·he·dral·ly -drəlē, -li adverb