barchan

名词 n.
中文释义
英 /ˈbɑːk(ə)n/|/bɑːˈkɑːn/    美 /ˈbɑɹˌkɑn/|/bɑɹˈkɑn/

英文释义

名词 n.
  1. An arc-shaped shifting sand dune comprising well-sorted (uniformly sized) sand. also,attributive
    — The sand is usually very well sorted in barchans, for it is constantly re-worked as the dune 'marches'. The marching also causes cross-bedding inside the barchan, with a dip parallel to the sand-fall face.

词形变化

barchans plural barchane alternative barkan alternative barkhan alternative

词源

Unadapted borrowing from Russian барха́н (barxán), from a Turkic language such as Kazakh барқан (barqan); further etymology unknown. The Russian word was first used in scientific literature in 1881 by the Russian zoologist and explorer Alexander von Middendorf (1815–1894).
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