Rom. Antiq. [L. compluvium, f. compluĕre to flow together (of rain).] A square opening in the roof of the atrium, through which fell the rain-water collected from the roof; also the inner square court into which the water so collected fell.

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1730.  A. Gordon, Maffei’s Amphit., 358–9. This then was the Compluvium mentioned by the Ancients, within the Arena, and explain’d by Isidorus, as being that Place where the Water all around was gathered.

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1832.  Gell, Pompeiana, II. xi. 2. The compluvium of the atrium is furnished with the mouths for cisterns.

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1859.  F. Mahoney, Rel. Father Prout, 467. Your traveller proceeded towards the compluvium, or open, quadrangular courtyard.

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