musculus sphincter ani externus

English Thesaurus

1. an external ring of striated muscle surrounding the anus (noun.body)

hypernym	:	skeletal muscle, striated muscle,
definition	:	a muscle that is connected at either or both ends to a bone and so move parts of the skeleton; a muscle that is characterized by transverse stripes (noun.body)

part meronym	:	anal sphincter, musculus sphincter ani, sphincter ani,
definition	:	the sphincter muscle of the anus (noun.body)