moulin

1. A chute through which supraglacial water enters a glacier, boring either to the bedrock or to the depth of common crevasse formation (synset 103033532)
   "the icy river plunged, roaring, into the moulin's blue depths"
   is a type of: chute, slide, slideway, sloping trough - sloping channel through which things can descend
   same as: glacier mill

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