magnetic variation

noun Navigation.
variation ( def 8 ). Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
magnetic variation
another name for magnetic declination

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
Magnetic declination, sometimes called magnetic variation, is the angle between magnetic north and true north.
Is the office of primary responsibility for establishing policy for worldwide application of magnetic variation values.
Lines drawn across aeronautical charts to connect points having the same magnetic variation.
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