(a.) Having seven angles or sides.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). heptagonal. Retrieved September 20, 2026, from http://smartdefine.org/heptagonal/definitions/2016018 |
| Chicago | Webster's. 2011. "heptagonal" http://smartdefine.org/heptagonal/definitions/2016018 (accessed September 20, 2026). |
| Harvard | Webster's 2011, heptagonal, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/heptagonal/definitions/2016018>. |
| MLA | Webster's. "heptagonal" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/heptagonal/definitions/2016018> |