Meaning of “esker” in the English Dictionary

british dictionary

"esker" in British English

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eskernoun [ C ]

uk /ˈes.kər/ us /ˈes.kɚ/ specialized

a long, narrow, raised line of earth, small stones, and sand left on the earth's surface where melted ice once flowed under a glacier

(Definition of “esker” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)