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noun
An isoline connecting points on the Earth's surface having the same mean temperature in the coldest month of the year.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
From iso- + Ancient Greek κρυμός (krumós, “cold, chilliness”) (see κρύος (krúos)). Coined by James D. Dana in 1854, who glossed κρυμός as "extreme cold".
