CAVITY

cavity, bodily cavity, cavum

(noun) (anatomy) a natural hollow or sinus within the body

pit, cavity

(noun) a sizeable hole (usually in the ground); “they dug a pit to bury the body”

cavity, caries, dental caries, tooth decay

(noun) soft decayed area in a tooth; progressive decay can lead to the death of a tooth

cavity, enclosed space

(noun) space that is surrounded by something

Source: WordNet® 3.1

Etymology

Noun

cavity (plural cavities)

A hole or hollow depression.

A hollow area within the body (such as the sinuses).

(dentistry) A small or large hole in a tooth caused by caries; often also a soft area adjacent to the hole also affected by caries.

Synonyms

• See also hole

• (dentistry): caries

Source: Wiktionary

Cav"i*ty, n.; pl. Cavities. Etym: [L. cavus hollow: cf. F. cavité.]

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.

Source: Webster’s Unabridged Dictionary 1913 Edition