cupula / cupulo [ˈkju:pələ]
cupula – n. – 1. the bony apex of the cochlea; 2. the peak of the pleural sac covering the apex of the lung
cupulo – n. – 1. alternate spelling of cupola – a rounded vault raised on a circular or other base and forming a roof or ceiling; compare dome; 2. a small structure built on the top of a roof to provide interior lighting or to serve as a look-out; 3. a vertical cylindrical furnace for burning iron; 4. beehive kiln; 5. a geological dome projecting from a batholith; 6. an observation post on a train