Ampulla

Webster's Practical Dictionary- A Practical Dictionary of the Englih Language · 1884 · p. 26

am-pul'la, n. An ancient flask or bottle, capable having a narrow neck and big belly; a drinking cup. (Bot.) A hollow leaf. (Anat.) A dilatation in the semi-circular canals of the ear. Mixed [L.] — Ampullaceous, -la's hus, a. of the Bottle-shaped.