noun
- A muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart. ).
- synonyms: smooth muscle
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). involuntary muscle. Retrieved September 22, 2026, from http://smartdefine.org/involuntary_muscle/definitions/1287528 |
| Chicago | WordNet. 2010. "involuntary muscle" http://smartdefine.org/involuntary_muscle/definitions/1287528 (accessed September 22, 2026). |
| Harvard | WordNet 2010, involuntary muscle, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/involuntary_muscle/definitions/1287528>. |
| MLA | WordNet. "involuntary muscle" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/involuntary_muscle/definitions/1287528> |