(a.) Of or pertaining to a trimester or period of three months; occurring once in every three months; quarterly.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Trimestrial. Retrieved September 25, 2026, from http://smartdefine.org/trimestrial/definitions/2074733 |
| Chicago | Webster's. 2011. "Trimestrial" http://smartdefine.org/trimestrial/definitions/2074733 (accessed September 25, 2026). |
| Harvard | Webster's 2011, Trimestrial, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/trimestrial/definitions/2074733>. |
| MLA | Webster's. "Trimestrial" 28 May 2011. Web. 25 September 2026. <http://smartdefine.org/trimestrial/definitions/2074733> |