barchan

[bahr-kahn]
noun
a crescent-shaped sand dune with the convex side in the direction of the wind.

Origin:
1885–90; < Russian barkhán, said to be < Turkic

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World English Dictionary
barchan, barkhan, barchane or barkan (bɑːˈkɑːn)
 
n
a crescent-shaped shifting sand dune, convex on the windward side and steeper and concave on the leeward
 
barkhan, barkhan, barchane or barkan
 
n
 
barchane, barkhan, barchane or barkan
 
n
 
barkan, barkhan, barchane or barkan
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

barchan

crescent-shaped sand dune produced by the action of wind predominately from one direction. One of the commonest types of dunes, it occurs in sandy deserts all over the world

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Large transverse and barchan dunes creep forward many feet per year, overwhelming all plant life in their paths.
Parabolic dunes are the predominant type, although barchan and transverse dunes appear.
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