| a unit, as an abampere, in the system of units derived from the magnetic effects of an electric current. Abbreviation: emu, EMU |
| 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. |
| 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. |