sphincter muscle, n.
a ring of muscle that contracts to close an opening
<noun.body>
anatomical sphincter sphincter sphincter muscle
semantic pointers
hypernym
hyponym
physiological sphincter
anal sphincter, sphincter ani, musculus sphincter ani
urethral sphincter, musculus sphincter urethrae
bladder sphincter, musculus sphincter vesicae
musculus sphincter ductus choledochi
musculus sphincter ductus pancreatici
pupillary sphincter, musculus sphincter pupillae
pyloric sphincter, pyloric valve, musculus sphincter pylori