n. 1. Dissection or opening of the head. [ 1913 Webster ]
2. (Med.) Craniotomy; -- usually applied to bisection of the fetal head with a saw. [ 1913 Webster ]
n. [ Gr. 'egke`falos the brain + &unr_; a cutting. ] (Surg.) The act or art of dissecting the brain. [ 1913 Webster ]