1. ănăs, ănătis (gen. plur. anatum, Cic. N. D. 2, 48, 124; Plin. 25, 2, 3, § 6; rarely anatium, Varr. R. R. 3, 5, 14; 3, 11, 1) [kindr. with old Germ. Anut; Lith. antis; mod. Germ. Ente; perh. also with Sanscr. ātis, a waterfowl], f., the duck: greges anatium, Varr. R. R. 3, 11: anatum ova, Cic. N. D. 2, 48, 124 al.: Anas fluviatilis, wild-duck, Ov. M. 11, 773.
2. ănās, ātis, f. [3. anus], disease of old women: anatem morbum anuum dicebant, id est, vetularum sicut senium morbum senum, Paul. ex Fest, p. 29 Müll.; cf. Placid. p. 435 Mai.
3. Ănas, ae, m., a river in Spain, now Guadiana (Arab., i. e. Wadi-Ana, = river Anas), Caes. B. C. 1, 38; Plin. 3, 1, 3, § 3; 4, 22, 35, § 116; Mel. 2, 6; 3, 1; cf. Mann. Hispan. 325.