Also found in: Dictionary.
1. the cutting up of the fetal head to facilitate delivery.
2. dissection of the fetal head.
Formerly used operation of cutting into the head of the fetus.
cephalotomy(1) In surgery, the opening of or incision into the head.
(2) The near-extinct practice of excising the head of a foetus in the face of cephalopelvic disproportion—e.g., when vaginal delivery of a breech presentation or hydrocephalic infant become impossible.