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wind rose

[wind] /wɪnd/
noun
1.
a map symbol showing, for a given locality or area, the frequency and strength of the wind from various directions.
2.
a diagram showing the relation of wind direction to other weather conditions at a given location.
Origin
1590-1600
1590-1600
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for wind-rose

wind rose

/wɪnd/
noun
1.
a diagram with radiating lines showing the frequency and strength of winds from each direction affecting a specific place
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for wind-rose

wind rose

map diagram that summarizes information about the wind at a particular location over a specified time period. A wind rose was also, before the use of magnetic compasses, a guide on mariners' charts to show the directions of the eight principal winds. The modern wind rose used by meteorologists gives the percentage of the time the wind blows from each direction during the observation period; it sometimes shows the strengths of these winds and the percentage of the time calm air or light winds are observed. This wind rose usually has eight radiating lines, whose lengths are proportional to wind frequency, and shows wind strength by the thickness of the lines or by feathers attached to them. The frequency of calm or nearly calm air is given as a number in the centre

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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8
9
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