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a nonthermal spring in which the water has a temperature appreciably lower than the mean annual temperature of the atmosphere in the vicinity of the spring, ümbritseva keskkonnaga võrreldes madalama keskmise temperatuuriga looduslik põhjaveevool
külm allikas . Limnoloogia sõnastik. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//lim/k%C3%BClm%20allikas/1/est (18.07.2026)