dune

[doon, dyoon]
noun
a sand hill or sand ridge formed by the wind, usually in desert regions or near lakes and oceans.

Origin:
1780–90; < French, Old French < Middle Dutch dūna; cognate with down3

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
dune (djuːn) [Click for IPA pronunciation guide]
 
n
a mound or ridge of drifted sand, occurring on the sea coast and in deserts
 
[C18: via Old French from Middle Dutch dūne; see down³]

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Dune is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Etymonline
Word Origin & History

dune
1790, from Fr., M.Du. or M.L.G., all of which had the word in similar form, all perhaps from Gaulish *dunom (thus related to down (n.2) and to town).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
dune   (dn)  Pronunciation Key 


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A hill or ridge of wind-blown sand. Dunes are capable of moving by the motion of their individual grains but usually keep the same shape. See more at barchan dune, draa, longitudinal dune, seif dune, transverse dune.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The dune buggy racers are kicking up dirt on their way to the track.
Only a dune separates the camping area from a long stretch of sandy beach.
Then they gather in clusters of six or seven, each group taking shelter behind
  a small dune and kindling a meager fire.
One of the more unusual approaches to the flying car combines a dune buggy with
  a propeller and a big parachute.
Images for dune
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