sphincter muscle

Noun

1.

sphincter muscle - a ring of muscle that contracts to close an opening Synonyms: anatomical sphincter, sphincter

anal sphincter, anatomical sphincter, bladder sphincter, muscle, musculus, musculus sphincter ani, musculus sphincter ductus choledochi, musculus sphincter ductus pancreatici, musculus sphincter pupillae, musculus sphincter pylori, musculus sphincter urethrae, musculus sphincter vesicae, physiological sphincter, pupillary sphincter, pyloric sphincter, pyloric valve, sphincter, sphincter ani, urethral sphincter