electromagnetic unit

n. (Abbr. EMU)
Any of various systems of units for electricity and magnetism based on a system of equations in which the permeability of free space is taken as unity and by means of which the abampere is defined as the fundamental unit of current.

EM unit, e.m. unit

Metric-c.g.s. While various units of the e.m.u. system have specific names obtained by prefixing more familiar names with ‘ab’, most are often referred to purely descriptively as the ‘e.m. unit of capacitance’, etc. The relevant units are, by subject and showing both distinct name and the SI equivalent of value, one e.m. unit of:

capacitance	abfarad	=  1 GF
electric charge	abcoulomb	= 10 C
electric conductance	abmho	=  1 GS
electric current	strength abampere	= 10 A
electric potential	abvolt	= 10 nV
electric resistance	abohm	=  1 nΩ
inductance	abhenry	=  1 nH
magnetic field strength	oersted	= 1/4π abampere·turn·cm-1
magnetic flux	maxwell	= 10 nWb
magnetomotive force	gilbert	= 1/4π abampere·turn

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The noun has one meaning:

Meaning #1: any of various systems of units for measuring electricity and magnetism
  Synonym: emu

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