- (n.) A muscle which surrounds, and by its contraction tends to close, a natural opening; as, the sphincter of the bladder.
- (a.) Of, pertaining to or designating, a sphincter; as, a sphincter muscle.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). sphincter. Retrieved September 22, 2026, from http://smartdefine.org/sphincter/definitions/2064827 |
| Chicago | Webster's. 2011. "sphincter" http://smartdefine.org/sphincter/definitions/2064827 (accessed September 22, 2026). |
| Harvard | Webster's 2011, sphincter, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/sphincter/definitions/2064827>. |
| MLA | Webster's. "sphincter" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/sphincter/definitions/2064827> |