noun
- A ring of muscle that contracts to close an opening.
- synonyms: sphincter, anatomical sphincter
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). sphincter muscle. Retrieved September 22, 2026, from http://smartdefine.org/sphincter_muscle/definitions/1312281 |
| Chicago | WordNet. 2010. "sphincter muscle" http://smartdefine.org/sphincter_muscle/definitions/1312281 (accessed September 22, 2026). |
| Harvard | WordNet 2010, sphincter muscle, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/sphincter_muscle/definitions/1312281>. |
| MLA | WordNet. "sphincter muscle" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/sphincter_muscle/definitions/1312281> |