noun
Anatomical term for the bony structure enclosing the brain. Used in medical and biological contexts.
脳蓋骨は脳を保護する重要な骨です。
The cranium is an important bone that protects the brain.
Compound of 脳 (のう, 'brain'), 蓋 (がい, 'lid, cover'), and 骨 (こつ, 'bone'). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning 'skull' or 'cranium'.