complŭvĭum (noun N) : compluit, I.
* A quadranguiar open space in the middle of a Roman house, which collected the rain-water flowing from the roofs and conducted it to a basin (impluvium) placed below, Varr. L. L. 5, § 161 Müll.; Paul. ex Fest. p. 108, 14 ib.; Varr. R. R. 1, 13, 3; Vitr. 6, 3, 1; * Suet. Aug. 92; cf. impluvium, II. A.— Hence
* Meton., a quadrangular support for vines, Col. 4, 24, 14 Schneid. N. cr.; 4, 26, 3; cf. compluviatus.

s. TLL