GNU Collaborative International Dictionary of English

Found one definition 

  1.       

    Cupola , n.; pl. Cupolas . [It. cupola, LL. cupula, cuppula (cf. L. cupula little tub). fr. cupa, cuppa, cup; cf. L. cupa tub. So called on account of its resemblance to a cup turned over. See Cup, and cf. Cupule.]
    1. (Arch.) A roof having a rounded form, hemispherical or nearly so; also, a ceiling having the same form. When on a large scale it is usually called dome.
      1913 Webster
    2. A small structure standing on the top of a dome; a lantern.
      1913 Webster
    3. A furnace for melting iron or other metals in large quantity, -- used chiefly in foundries and steel works.
      1913 Webster
    4. A revolving shot-proof turret for heavy ordnance.
      1913 Webster
    5. (Anat.) The top of the spire of the cochlea of the ear.
      1913 Webster