cupola
noun
[ ˈkjuːpələ ]
• a rounded dome forming or adorning a roof or ceiling.
• "a square tower crowned by a cupola"
• a gun turret.
• a cylindrical furnace for refining metals, with openings at the bottom for blowing in air and originally with a dome leading to a chimney above.
Origin:
mid 16th century: Italian, from late Latin cupula ‘small cask or burying vault’, diminutive of cupa ‘cask’.
