musculus sphincter ani

English Thesaurus

1. the sphincter muscle of the anus (noun.body)

hypernym	:	anatomical sphincter, sphincter, sphincter muscle,
definition	:	a ring of muscle that contracts to close an opening (noun.body)

part holonym	:	musculus sphincter ani externus,
definition	:	an external ring of striated muscle surrounding the anus (noun.body)

part holonym	:	musculus sphincter ani internus,
definition	:	an internal ring of smooth muscle formed by circular fibers of the rectum (noun.body)

part meronym	:	anus,
definition	:	the excretory opening at the end of the alimentary canal (noun.body)