sphincter ani(n = noun.body) anal sphincter, musculus sphincter ani - the sphincter muscle of the anus;
is a kind of anatomical sphincter, sphincter, sphincter muscle
is a part of anus
has parts: musculus sphincter ani externus, musculus sphincter ani internus

anal sphincter, anatomical sphincter, ani, bladder sphincter, cardiac sphincter, musculus sphincter ani, musculus sphincter ani externus, musculus sphincter ani internus, musculus sphincter ductus choledochi, musculus sphincter ductus pancreatici, musculus sphincter pupillae, musculus sphincter pylori, musculus sphincter urethrae, musculus sphincter vesicae, physiological sphincter, pruritus ani, pupillary sphincter, pyloric sphincter, sphincter, sphincter muscle, urethral sphincter