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Noun: moulin  moo-lin
  1. A chute through which supraglacial water enters a glacier, boring either to the bedrock or to the depth of common crevasse formation
    "the icy river plunged, roaring, into the moulin's blue depths";
    - glacier mill

Derived forms: moulins

Type of: chute, slide, slideway, sloping trough

Encyclopedia: Moulin, Scotland