extrinsic sphincter
n.
A sphincter formed by circular muscular fibers extraneous to the organ.
Words nearby extrinsic sphincter
extrinsic,
extrinsic allergic alveolitis,
extrinsic eye muscle,
extrinsic factor,
extrinsic incubation period,
extrinsic sphincter,
extro-,
extrorse,
extrospection,
extroversion,
extrovert