Lewis Short
ninguis (noun 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.
Charlton T. Lewis, Charles Short, A Latin Dictionary