cavity
/ˈkævətɪ/noun
(pl. -ies)
1- an empty space within a solid object, in particular the human body（尤指人体等固体物的）腔, 洞：
the abdominal cavity.
腹腔。
1.1
- a decayed part of a tooth龋洞。
派生词
cavitary
adjective词源
mid 16th cent.: from French cavité or late Latin cavitas, from Latin cavus 'hollow'.