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longitudinal dune

American  

noun

plural

longitudinal dunes

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

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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.