Lewis & Short

ninguis, is, f. [kindr. with nix], snow (ante- and post-class.): albas descendere ningues, Lucr. 6, 736 (but id. 6, 964, the correct read. is nives, v. Lachm. ad h. l.); so according to Lucil. ap. Charis. p. 71 P.; App. ap. Prisc. p. 724 P.