prŭīna, ae, f. [for provina; root pra-, prae; cf. Gr. πρωΐ, early],
I hoar-frost , rime (cf.: glacies, gelu), Cic. N. D. 2, 10, 26; Sen. Q. N. 4, 3 fin. ; Plin. 2, 60, 61, § 152; Varr. R. R. 2, 2; Lucr. 2, 431 et saep.—In plur.: pruinae ac nives, Cic. Cat. 2, 10, 23; Hor. C. 1, 4, 4: matutinae, Ov. M. 3, 488; Val. Fl. 2, 287 al.—
II Transf.
A Snow (poet. and in post-class. prose): nix concreta pruinā, Lucr. 3, 20: gelidae, Verg. G. 2, 263; 3, 368; Val. Fl. 8, 210; Gell. 12, 5, 11.—
B Ad medias sementem extende pruinas, winter , Verg. G. 1, 230.