(n)an abnormally large head; differs from hydrocephalus because there is no increased intracranial pressure and the overgrowth is symmetrical, Syn.megacephaly, megalocephaly
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. THe condition of having an unusually large head; it differs from hydrocephalus because there is no increase intracranial pressure and the overgrowth is symmetrical. Syn. -- megacephaly, megalocephaly. [ WordNet 1.5 ]