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foehn

[feyn; German fœn] /feɪn; German fœn/
noun
1.
a warm, dry wind descending a mountain, as on the north side of the Alps.
Also, föhn.
Origin
1860-1865
1860-65; < German Föhn (orig. in Alpine dialects), Middle High German foenne, Old High German phōnno < Vulgar Latin *faōnius, for Latin Favōnius Favonius
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for foehn
  • Down slope foehn type winds are not uncommon during the fire season.
British Dictionary definitions for foehn

foehn

/fɜːn; German føːn/
noun
1.
(meteorol) a variant spelling of föhn

föhn

/fɜːn; German føːn/
noun
1.
a warm dry wind blowing down the northern slopes of the Alps. It originates as moist air blowing from the Mediterranean, rising on reaching the Alps and cooling at the saturated adiabatic lapse rate, and descending on the leeward side, warming at the dry adiabatic lapse rate, thus gaining heat See also lapse rate
Word Origin
German, from Old High German phōnno, from Latin favōnius; related to fovēre to warm
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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foehn in Science
foehn also föhn
  (fɶn, fān)   
A warm, dry, and often strong wind coming off the lee slopes of a mountain range, especially off the northern slopes of the Alps. A foehn is a katabatic wind that warms as it descends because it has dropped its moisture before crossing the mountain range and is put under greater atmospheric pressure as it moves downward. Various local names are also used for foehns (such as chinook in the Rocky Mountain regions). A foehn can cause sudden and dramatic increases in the temperature—from 10° to 20°C (50° to 68°F) in a few minutes—which can cause snow to melt rapidly and even trigger flooding. See also chinook.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for foehn

warm and dry, gusty wind that periodically descends the leeward slopes of nearly all mountains and mountain ranges. The name was first applied to a wind of this kind that occurs in the Alps, where the phenomenon was first studied.

Learn more about foehn with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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