Cavity

Part of speech: noun (n.)

1. Hollowness. [Obs.] The cavity or hollowness of the place. Goodwin.

2. A hollow place; a hollow; as, the abdominal cavity. An instrument with a small cavity, like a small spoon. Arbuthot. Abnormal spaces or excavations are frequently formed in the lungs, which are designated cavities or vomicæ. Quain. Body cavity, the coelum. See under Body.