Lewis & Short

Jūturna, ae, f. [juvo],

  1. I. a fountain in Latium: Juturna fons est in Italia saluberrimus juxta Numicum flumen, Serv. Verg. A. 12, 139.
  2. II. Hence, also, a nymph, sister of Turnus, the king of the Rutuli, Verg. A. 12, 146; 154; Ov. F. 2, 585; 606.
    Hence, ad Juturnae (sc. aedem), Cic. Clu. 36: Juturnae lacus, in Rome, Ov. F. 1, 708; Lact. 2, 7, 9.
    Hence, Jūturnālĭa, ium, n., the festival of the nymph Juturna, Serv. Verg. A. 12, 139.