magnetic north

noun
north as indicated by a magnetic compass, differing in most places from true north.

Origin:
1805–15

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Collins
World English Dictionary
magnetic north
 
n
the direction in which a compass needle points, at an angle (the declination) from the direction of true (geographic) north

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
magnetic north  
The direction toward which the north-seeking arrow of a compass points. ◇ The magnetic north pole is the northern pole of the Earth's magnetic field and changes slightly in response to variations in the Earth's magnetism. The current magnetic north pole is located in the Arctic Islands of Canada. Compare geographic north.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

magnetic north definition


The direction of the north magnetic pole.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
They also give information on the direction of magnetic north.
Magnetic north becoming south, and south becoming north.
And, when grazing or resting, cows tended to face either magnetic north or
  south.
Using gyroscopes and accelerometers, the controller orients itself to the
  magnetic north, and senses the direction it is pointing.
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