longitudinal dune

American  

noun

longitudinal dunes plural

1. a type of sand dune occurring in windy environments behind an obstacle, having a large, long, symmetrical shape. Compare transverse dune.

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longitudinal dune Scientific  

/ lŏn′jĭ-to̅o̅d′n-əl /

1. A large, elongated dune lying parallel to the prevailing wind direction. Longitudinal dunes usually have symmetrical cross sections. They generally form in areas that are located behind an obstacle where sand is abundant and the wind is constant and strong. They are usually tens of meters high and up to 100 km (62 mi) long.

2. Compare transverse dune

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Other Word Forms

Noun Inflected Forms

• longitudinal dunes
  plural