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Related to geomagnetic reversal: Geomagnetic field
A change in the earth's magnetic field resulting in the switch in position of the earth's magnetic north and south poles. Also called magnetic reversal.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.