/kyooh"peuh leuh/ , n.
1. Archit.
a. a light structure on a dome or roof, serving as a belfry, lantern, or belvedere.
b. a dome, esp. one covering a circular or polygonal area.
2. any of various domelike structures.
3. Metall. a vertical furnace for melting iron to be cast.
[ 1540-50; cupula, equiv. to cup ( a ) tub + -ula -ULE. Cf. CUP ]