pyloric sphincter

English Thesaurus

1. the sphincter muscle of the pylorus that separates the stomach from the duodenum (noun.body)

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

part meronym	:	pylorus,
definition	:	a small circular opening between the stomach and the duodenum (noun.body)