cranium

noun
cra·​ni·​um | \ ˈkrā-nē-əm How to pronounce cranium (audio) \
plural craniums or crania\ ˈkrā-​nē-​ə How to pronounce crania (audio) \

Definition of cranium

: skull specifically : the part of the skull that encloses the brain : braincase Among the physical characters that distinguish them from other early humans are the long, low sweep of the Neanderthal cranium— James Shreeve "Hey, big head!" Mahorn shouted. Aguirre does, in fact, have an extraordinary cranium. — Jeff Coplon You don't "watch" a film like Fight Club; you mainline a deluge of visual and sonic information (including a hefty chunk of the IKEA catalog) straight into your cranium. — Jeff Gordinier