Source : Webster's Revised Unabridged Dictionary (1913)

Ampulla \Am*pul"la\, n.; pl. {Ampull[ae]}. [L. ]
   1. (Rom. Antiq.) A narrow-necked vessel having two handles
      and bellying out like a jug.

   2. (Eccl.)
      (a) A cruet for the wine and water at Mass.
      (b) The vase in which the holy oil for chrism, unction, or
          coronation is kept. --Shipley.

   3. (Biol.) 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.

Source : WordNet®

ampulla
     n 1: the dilated portion of a canal or duct especially of the
          semicircular canals of the ear
     2: a flask that has two handles; used by Romans for wines or
        oils
     [also: {ampullae} (pl)]