Refers to the bone of the jaw; synonymous with the medical term 顎骨 (がっこつ).
See also: 顎骨
I fell and broke my jawbone.
The shape of the jawbone differs from person to person.
Standard kanji spelling for the jawbone.
Mixed kana-kanji spelling; common in everyday writing.
Compound of 顎 (あご, 'jaw') + の (possessive particle) + 骨 (ほね, 'bone').