cavity

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柯林斯词典

cavity /ˈkævɪtɪ/ (cavities)

1. N-COUNT A cavity is a space or hole in something such as a solid object or a person's body. 洞; 腔[正式]
...a cavity in the roof. …屋顶的一个洞。
2. N-COUNT In dentistry, a cavity is a hole in a tooth, caused by decay. (牙齿的) 龋洞[技术]

剑桥词典

cavity noun [C] (HOLE)

cavity noun [C] (TOOTH)

cavity noun [C] (IN THE BODY)