(architecture) A dome-shaped ornamental structure located on top of a larger roof or dome.
the light falling dimly through the foggy cupola.
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(military, railroad) A small turret, usually on a hatch of an armoured fighting vehicle.
The cupola has a small cylindrical chimney-like bore that is lined with a refractory material.
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(geology) An upward-projecting mass of plutonic rock extending from a larger batholith.
Cast iron produced in a cupola possesses the following advantages : The cost of melting is low. The control of chemical composition is better. Temperature control is easier. Molten metals can be tapped from the cupola at regular intervals.
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