megacephaly

/ ˌmɛɡəsɪˈfælɪk; ˌmɛɡəˈsɛfəlɪ /

noun

1. See microcephaly
   the condition of having an unusually large head or cranial capacity. It can be of congenital origin or result from an abnormal overgrowth of the facial bones Compare microcephaly

Derived Forms

• megacephalic, adjective