Pruina

Pruina vel rima mollis frigido die hiemali in Saxonia Inferiore.

Pruina est ros frigore concretus, qui tempore hiemali et sereno fit; "pruina e rore gelido gignitur", ut Plinius dicit[1]. "Hiberno ac verno tempore, pruina iam exhalata, propellunt oves in pabulum"[2].


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