PERMAFROST


Meaning of PERMAFROST in English

/ ˈpɜːməfrɒst; NAmE ˈpɜːrməfrɔːst/ noun

[ U ] ( technical ) a layer of soil that is permanently frozen, in very cold regions of the world

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WORD ORIGIN

1940s: from permanent + frost .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.