yardang

yardang
[ˈjɑːdaŋ]
noun
  1. a sharp irregular ridge of sand lying in the direction of the prevailing wind in exposed desert regions, formed by the wind erosion of adjacent material which is less resistant
    风蚀土脊,白龙堆
语源
  1. early 20th cent.: from Turkish, ablative of yar 'steep bank'
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