单词 | barchan |
释义 | barchan|bɑːˈkɑːn| Also barchane, barkhan. [Native word.] A crescent-shaped dune of shifting sand such as occur in the deserts of Turkestan. Also attrib.
1888Encycl. Brit. XXIII. 511/2 Shifting sands blown into barkhans, or elongated hills, sometimes 50 and 60 feet in height. 1897[see medano]. 1900Geogr. Jrnl. XV. 24 On the higher portions of the foreland, to leeward and further from the river barchans (or medanos) occur. 1953Sci. News XXVII. 14 The barchan types [of dune]..found only where the wind is predominantly from a single direction. |

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