Astringent. Having the power of contracting organic textures.

Atrophy. Wasting.

Auscultation. Listening, observing the sounds in the thorax, &c.

Autopsy. A post mortem examination.

Axilla. The arm pit.

Axis. A line passing through the center of a body.

Bacteria. A kind of microscopic organism.

Ballottement. The falling back of the displaced fœtus.

Basis. That part upon which anything rests.

Benign. Of a mild character.