D defs.my
Entry 1 sense Webster, 1913

Drumlin

· Drum·lin · IPA /[ˈdɹʌmlɪn]/
01 n. A hill of compact, unstratified, glacial drift or till, usually elongate or oval, with the larger axis parallel to the former local glacial…
  1. 1.
    A hill of compact, unstratified, glacial drift or till, usually elongate or oval, with the larger axis parallel to the former local glacial motion.(Geol.)