cupola

cupola is a Noun

Definition:

[1] A roof having a rounded form, hemispherical or nearly so; also, a celing having the same form. When on a large scale it is usually called dome.

[2] A small structure standing on the top of a dome; a lantern.

[3] A furnace for melting iron or other metals in large quantity, -- used chiefly in foundries and steel works.

[4] A revoling shot-proof turret for heavy ordnance.

[5] The top of the spire of the cochlea of the ear.

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