magnetic declination


noun

the angle that a compass needle makes with the direction of the geographical north pole at any given point on the earth's surfaceAlso called: declination, magnetic variation

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Scientific definitions for magnetic declination

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.