1. (n.) The opening of an artery, esp. for bloodletting.

2. (n.) That part of anatomy which treats of the dissection of the arteries.

amygdalotomy ankylotomy arteriotomy blepharotomy caesarean cardiotomy celiotomy cholecystotomy cirsotomy coccygotomy colpotomy craniotomy cystotomy embryotomy enterotomy gastroenterotomy gastrotomy glossotomy hebotomy herniotomy hysterotomy laparotomy lithotomy mastotomy nephrotomy neurotomy ovariotomy pancreatotomy phrenicotomy pneumonotomy prefrontal lobotomy prostatotomy psychosurgery salpingotomy sclerotomy thoracotomy thyrotomy tonsillotomy ureterotomy urethrotomy