脳のう蓋がい骨こつMeanings1nouncranium; skull; brainpananatomyAnatomical term for the bony structure enclosing the brain. Used in medical and biological contexts.脳のう蓋がい骨こつは脳のうを保ほ護ごする重じゅう要ような骨ほねです。The cranium is an important bone that protects the brain.