Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun musculus_sphincter_ani_internus

1 sense of musculus sphincter ani internus

Sense 1
musculus sphincter ani internus -- (an internal ring of smooth muscle formed by circular fibers of the rectum)
       => smooth muscle, involuntary muscle -- (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))