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Stage 1 of 3
cupula
Latin · ancient
"a small cup"
a small cup, a diminutive of cupa (a cask, a tub)
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Stage 2 of 3
cupola
Italian · 1600s
"a small dome"
settled in Italian for a small dome atop a roof or building
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Stage 3 of 3
cupola
English · 1650s
"a small dome-shaped structure on a roof"
adopted directly for the small rounded dome structure
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