irrĭgātĭo (inr-), ōnis, f. [irrigo],
a watering , irrigating : quos (pulvinos) irrigationes abluunt, Varr. R. R. 1, 35, 1: agrorum, Cic. Off. 2, 4, 14: agri, id. de Sen. 15, 53.— With gen. subj. : irrigatione fluminis diluere aliquid, Plin. 36, 12, 17, § 81.—Also transf., refreshment : irrigation ossium tuorum, Vulg. Prov. 3, 8.