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drumlin

noun
🔊/ˈdrʌmlɪn/
🔊/ˈdrʌmlɪn/
 (geology地质学)
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  1. a very small hill formed by the movement of a glacier（冰川形成的）鼓丘 (= a large moving mass of ice)Topics Geographyc2
    Word Originmid 19th cent.: probably from drum ‘a long narrow hill’ + -lin (from -ling).