magnetic declination

magnetic declination

noun Navigation.
variation ( def 8 ).
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World English Dictionary
magnetic declination
 
n
declination, Also called: magnetic variation the angle that a compass needle makes with the direction of the geographical north pole at any given point on the earth's surface

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
magnetic declination  
The horizontal angle between the true geographic North Pole and the magnetic north pole, as figured from a specific point on the Earth. Compare magnetic inclination.
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