牙缝儿 Traditional form: 牙縫兒 Pinyin (reading): yáfèngr Definitions: gap between teeth Characters: 牙 - tooth, molar; fang, tusk; serrated 缝 - to sew, to mend 儿 - son, child Traditional characters: 牙 - tooth, molar; fang, tusk; serrated 縫 - to sew, to mend 兒 - son, child