loess /ˈlɛs, ˈlʌs, ˈloəs, ˈlɚ/
  黃土
  Loess n.  Geol. A quaternary deposit, usually consisting of a fine yellowish earth, on the banks of the Rhine and other large rivers.
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  loess
       n : a fine-grained unstratified accumulation of clay and silt
           deposited by the wind