also: がくこつ · あごぼね
noun
Anatomical term for the bone of the jaw; can refer to either the upper or lower jawbone, though often used for the mandible.
事故で顎骨を骨折した。
I fractured my jawbone in the accident.
顎骨のレントゲンを撮りましょう。
Let's take an X-ray of your jawbone.