- (n.) An instrument for measuring angles.
- (n.) A semicircumference.
- (n.) A body in the form of half of a circle or half of a circumference.
- (n.) The half of a circle; the part of a circle bounded by its diameter and half of its circumference.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). semicircle. Retrieved September 22, 2026, from http://smartdefine.org/semicircle/definitions/2060180 |
| Chicago | Webster's. 2011. "semicircle" http://smartdefine.org/semicircle/definitions/2060180 (accessed September 22, 2026). |
| Harvard | Webster's 2011, semicircle, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/semicircle/definitions/2060180>. |
| MLA | Webster's. "semicircle" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/semicircle/definitions/2060180> |