adjective Date: 1794 being a polyhedral angle with four faces, relating to, forming, or having the form of a tetrahedron, ~ly adverb
TETRAHEDRAL
Meaning of TETRAHEDRAL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012