sand dune

hill of drifted sand, mound of sand, small hill made of sand

In physical geography, a dune is a hill of sand built by eolian processes. Dunes are subject to different forms and sizes based on their interaction with the wind. Most kinds of dune are longer on the windward side where the sand is pushed up the dune, and a shorter "slip face" in the lee of the wind. The "valley" or trough between dunes is called a slack. A "dune field" is an area covered by extensive sand dunes. Large dune fields are known as ergs.
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A dune is a sand formation, but also maintains several other meanings.
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Noun
1. a ridge of sand created by the wind; found in deserts or near lakes and oceans
(synonym) dune
(hypernym) ridge
(hyponym) seif dune

Synonyms and related words:
anthill, barrow, brae, butte, down, drumlin, dune, fell, foothills, hill, hillock, hummock, knob, knoll, molehill, monticle, monticule, moor, mound, sand, sand pile, sandbar, swell
  

sand-dune /'sænd'dju:n/
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