Ampulla: the expanded, usually terminal region of many anatomical ducts and canals. Named for a fancied similarity to an ampulla, the Latin name for a rounded flask with a narrow neck, used for storage of oils or perfumes.

The body's ampullae include the ampulla of the uterine (fallopian) tube, the ampulla of the ductus (vas) deferens, the ampulla of Vater that empties bile and pancreatic secretons into the small intestine, and the ampullae of the semicircular canals (perhaps so-named because many ampulla flasks have semicircular handles).

Ampulla of Saint Menas, ca 650 AD, Byzantine; Probably made at Abu Menas, near Alexandria, Egypt www.stmina-monastery.org