Read Edit View history 龋洞 qǔdòng cavity Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 龋洞/齲洞 · qǔdòng · cavity 2026/03/04 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。 created sense Mar 4, 2026, 02:25 AM