Anatomy . a dilated portion of a canal or duct, esp. of the semicircular canals of the ear.

Zoology, Botany . any flask-shaped structure.

Ecclesiastical .

a vessel for the wine and water used at the altar.

a vessel for holding consecrated oil.

a two-handled bottle having a somewhat globular shape, made of glass or earthenware, used by the ancient Romans for holding oil, wine, or perfumes.

Ichthyology . ampulla of Lorenzini.