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seif dune

noun
  1. (in deserts, esp the Sahara) a long ridge of blown sand, often several miles long
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Word Origin for seif dune

seif, from Arabic: sword, from the shape of the dune
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

seif dune in Science

seif dune

[sāf, sīf]
  1. A sharp-crested longitudinal sand dune or chain of sand dunes common to the Sahara and ranging up to 300 m (984 ft) in height and 300 km (186 mi) in length.
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