Denshi Jisho — Online Japanese dictionary

あご chin; jaw
Common word, Noun, No-adjective 
あぎと 1: (Archaism) chin; jaw;
2: (Archaism) gills; branchia
Noun 
かがく lower jaw
Noun, No-adjective 
うわあご upper jaw; palate
Noun 
したあご lower jaw
Noun, No-adjective 
じょうがく upper jaw; palate
Noun 
二重 ふたえあご double chin
Noun 
二重 にじゅうあご double chin
Noun 

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