The Collaborative International Dictionary
Macrencephalic
Macrencephalic \Mac`ren*ce*phal"ic\, Macrencephalous \Mac`ren*ceph"a*lous\, a. [Macro + encephalic, encephalous.] Of or pertaining to macrencephaly; having a large brain.
Wiktionary
macrencephalic
a. Having a large brain.
WordNet
macrencephalic
adj. having a large brain case [syn: macrencephalous]