Read Edit View history 龋洞 qǔdòng cavity Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 龋洞/ 齲洞 qǔdòng cavity hole in a tooth caused by dental caries 如果不注意口腔卫生,牙齿上很容易产生龋洞。 Edit Delete References Add reference No references for this word.