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electromagnetic unit

noun
1.
a unit, as an abampere, in the system of units derived from the magnetic effects of an electric current.
Abbreviation: emu, EMU.
Origin
1910-1915
1910-15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for electro magnetic unit

electromagnetic unit

noun
1.
any unit that belongs to a system of electrical cgs units in which the magnetic constant is given the value of unity and is taken as a pure number Abbreviation EMU, e.m.u. Compare electrostatic unit
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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electro magnetic unit in Science
electromagnetic unit  
Any of various units, such as the abampere and the stilb, used in the centimeter-gram-second system of units to describe electric and magnetic field strengths, electric current strengths, and other quantities associated with electromagnetism.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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