(a.) Having three angles or corners; triangular; as, a trigonal stem, one having tree prominent longitudinal angles.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). trigonal. Retrieved September 20, 2026, from http://smartdefine.org/trigonal/definitions/2074669 |
| Chicago | Webster's. 2011. "trigonal" http://smartdefine.org/trigonal/definitions/2074669 (accessed September 20, 2026). |
| Harvard | Webster's 2011, trigonal, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/trigonal/definitions/2074669>. |
| MLA | Webster's. "trigonal" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/trigonal/definitions/2074669> |