下した顎あごalso: かがくしたあごMeanings1nounlower jaw; mandibleAnatomical term for the lower jawbone. In everyday speech, したあご is common; かがく is more technical.彼かれは転ころんで下した顎あごを強つよく打うった。He fell and hit his lower jaw hard.下した顎あごの骨ほねは顔かおの中なかで最もっとも大おおきい。The mandible is the largest bone in the face.
