also: かがく
noun
lower jaw; mandible
Anatomical term for the lower jawbone. In everyday speech, したあご is common; かがく is more technical.
彼は転んで下顎を強く打った。
He fell and hit his lower jaw hard.
下顎の骨は顔の中で最も大きい。
The mandible is the largest bone in the face.
Mixed kanji-kana spelling, often used in educational or simplified contexts.
Compound of 下 (した, 'lower') and 顎 (あご, 'jaw'). The on'yomi reading かがく is derived from the Chinese readings of the characters.