urethral sphincter

English Thesaurus

1. a striated sphincter muscle that constricts the urethra (noun.body)

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

part meronym	:	urethra,
definition	:	duct through which urine is discharged in most mammals and which serves as the male genital duct (noun.body)