龋齿症 qǔchǐzhèng tooth decay Origin Definitions Defs Strokes Stroke Words Sentences Sents 龋齿 齲齒 qǔchǐ tooth decay dental caries or decay, caused by the erosion of tooth enamel by acidic substances produced by food residue症 zhèng affixnoun disease (bound form) disease; illness; medical symptoms