一切經音義 2.21

2.21

爪齒（上側狡反說文手足甲也象形下昌止反說文口齗骨也象口齒形止聲也齗音銀）。

Claws and teeth (爪齒: the upper character is ce + jiao fan. The Shuowen jiezi says: the nails of hands and feet; it is a pictographic character. The lower character is chang + zhi fan. The Shuowen jiezi says: the bones of the mouth and gums; it is pictographic of the teeth in the mouth, with zhi (止) phonetic. Gums (齗) is pronounced yin).