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Related to electric monopole: magnetic monopole
A single electric point charge, such as an electron or positron, in which all the electric field lines point inward for a net negative electric charge or away for a net positive electric charge.
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.