temperatuuri langemisel alla 0 °C õhus olevast veeaurust tekkinud ebaühtlane jääkristallide kiht maapinnal, taimedel vm (hrl kevadel ja sügisel)
inglise keelesgray (grey)uneven layer of ice crystals on the ground, on plants or other (Mr. spring and autumn) formed by water vapour in the air when temperatures fall below 0 °C
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