(n) an abnormally large head; differs from hydrocephalus because there is no increased intracranial pressure and the overgrowth is symmetrical, Syn.megacephaly, megalocephaly
{ ‖, n. [ NL. megalocephalia, fr. Gr. &unr_; having a large head. ] (Med.) The condition of having an abnormally large head; called also megacephaly. -- Meg`a*lo*ce*phal"ic a. [Webster 1913 Suppl.]