WordNet (r) 3.0 (2006):

caesarian section
    n 1: the delivery of a fetus by surgical incision through the
         abdominal wall and uterus (from the belief that Julius
         Caesar was born that way) [syn: cesarean delivery,
         caesarean delivery, caesarian delivery, cesarean
         section, cesarian section, caesarean section,
         caesarian section, C-section, cesarean, cesarian,
         caesarean, caesarian, abdominal delivery]