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Stage 1 of 2
atrium
Latin · ancient
"the central hall of a Roman house"
the central open-roofed hall of a Roman house, said to be named for its smoke-blackened walls
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Stage 2 of 2
atrium
English · 1500s
"a central open hall in a building"
adopted directly for a central open hall, later reapplied to modern building interiors
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