换牙 Traditional form: 換牙 Pinyin (reading): huànyá Definitions: to grow replacement teeth (zoology) to grow permanent teeth in place of milk teeth Characters: 换 - to change; to exchange, to swap, to trade 牙 - tooth, molar; fang, tusk; serrated Traditional characters: 換 - to change; to exchange, to swap, to trade 牙 - tooth, molar; fang, tusk; serrated