Cupola
WordNet
noun
(1) A roof in the form of a dome
(2) A vertical cylindrical furnace for melting iron for casting
WiktionaryText
Etymology
From , from ; from , ; named for its resemblance to a cup turned over.
Noun
- A dome-shaped ornamental structure located on top of a larger roof or dome.
- A small turret, usually on a hatch of an armoured fighting vehicle.