(n.) A solid figure inclosed or bounded by four triangles.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). tetrahedron. Retrieved September 30, 2026, from http://smartdefine.org/tetrahedron/definitions/2071571 |
| Chicago | Webster's. 2011. "tetrahedron" http://smartdefine.org/tetrahedron/definitions/2071571 (accessed September 30, 2026). |
| Harvard | Webster's 2011, tetrahedron, Smart Define, viewed 30 September, 2026, <http://smartdefine.org/tetrahedron/definitions/2071571>. |
| MLA | Webster's. "tetrahedron" 28 May 2011. Web. 30 September 2026. <http://smartdefine.org/tetrahedron/definitions/2071571> |