WordNet (r) 3.0 (2006):

epidural anaesthesia
    n 1: regional anesthesia resulting from injection of an
         anesthetic into the epidural space of the spinal cord;
         sensation is lost in the abdominal and genital and pelvic
         areas; used in childbirth and gynecological surgery [syn:
         epidural anesthesia, epidural anaesthesia, epidural]