I. Act., that waters, irrigates; watering, irrigating: “in vallibus amnes,” Verg. G. 2, 485.—
II. Pass., watered, wellwatered: “hortus,” Ov. M. 8, 646; 10, 190; 13, 797: “pratum,” Col. 2, 16, 3: “mons scatebris fontium,” Plin. 5, 1, 1, § 6.—Transf.: “quae plurimo lacte rigua bos est,” i. e. distended with milk, Sol. 2.— Hence, subst.: rĭgŭa , ōrum, n., well-watered places: “circa Babylonis rigua,” Plin. 9, 57, 83, § 175; 17, 26, 39, § 247; so once in sing.: rĭgŭus , i, m. (sc. ager), a well-watered place, id. 17, 26, 41, § 250.