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frost - a frost is said to occur when air temperature falls below the freezing point of water, külmavaba periood kestab kevadisest hiliskülmast sügisese varakülmani
frostfree . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/frostfree/1/eng (01.07.2026)