Anus.—Circular opening or outlet of the bowels.
Aorta.—The great artery of the heart.
Aperient.—Laxative, mild cathartic.
Aphrodisiac.—To excite sexual desire, or to increase the generative power.
Aphtha.—Thrush. Infants’ sore mouth.
Apis Mellifica.—Honey bee.
Arnica Montana.—Leopard’s bane.
Arsenicum Album.—White arsenic.
Astringent.—Binding, contracting.
Auricle.—Upper chambers of the heart.