perineotomy

English Thesaurus

1. surgical incision into the perineum (noun.act)

hypernym	:	incision, section, surgical incision,
definition	:	the cutting of or into body tissues or organs (especially by a surgeon as part of an operation) (noun.act)

hyponym	:	episiotomy,
definition	:	surgical incision of the perineum to enlarge the vagina and so facilitate delivery during childbirth (noun.act)