Wiktionary
hoar-frosts
n. (plural of hoar-frost English)
Usage examples of "hoar-frosts".
It was that rather sad time of year when for the first time for many months the fine old sun still blazes away in a cloudless sky, but does not warm you, and the hoar-frosts and the mists and the winds begin to stir their faint limbs at morning and evening, with the gossamer, as the sap of winter vigor remembers itself in the cold corpses which brave summer slew.