noun
moulin; vertical shaft in a glacier
A glaciology term for a roughly vertical hole or shaft in a glacier through which meltwater can drain.
氷河の表面に大きなムーランが開いている。
A large moulin has opened on the surface of the glacier.
融け水はムーランを通って氷河の底へ流れ込む。
Meltwater flows through the moulin down to the bottom of the glacier.