Ampulla

pl. Ampullæ

1. A narrow-necked vessel having two handles and bellying out like a jug. (Rom. Antiq.)
2. A cruet for the wine and water at Mass. (Eccl.)
3. Any membranous bag shaped like a leathern bottle, as the dilated end of a vessel or duct; especially the dilations of the semicircular canals of the ear. (Biol.)