(a.) Having four angles, and consequently four sides; tetragonal.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). quadrangular. Retrieved September 20, 2026, from http://smartdefine.org/quadrangular/definitions/2051524 |
| Chicago | Webster's. 2011. "quadrangular" http://smartdefine.org/quadrangular/definitions/2051524 (accessed September 20, 2026). |
| Harvard | Webster's 2011, quadrangular, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/quadrangular/definitions/2051524>. |
| MLA | Webster's. "quadrangular" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/quadrangular/definitions/2051524> |