1. (n.) A cavity, or one of the cavities, of an organ, as of the larynx or the brain; specifically, the posterior chamber, or one of the two posterior chambers, of the heart, which receives the blood from the auricle and forces it out from the heart. See Heart.

2. (n.) The stomach.

3. (n.) Fig.: Any cavity, or hollow place, in which any function may be conceived of as operating.

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