頭とう骨こつとうこつCommon wordFreq.FrequencyTop 50,000Meanings1nounskullanatomyAnatomical term for the bony structure of the head. In everyday conversation, 頭蓋骨 (ずがいこつ) is more common.頭とう骨こつの構こう造ぞうを詳くわしく学まなぶ。Study the structure of the skull in detail.この標ひょう本ほんはヒトの頭