| a large, flightless, ratite bird, Emu (Dromaius) novaehollandiae, of Australia, resembling the ostrich but smaller and having a feathered head and neck and rudimentary wings. |

| 1. | Also, emu electromagnetic unit. |
| 2. | Aerospace. extravehicular mobility unit. |
| a unit, as an abampere, in the system of units derived from the magnetic effects of an electric current. Abbreviation: emu, EMU |

| a spacesuit worn by a space-shuttle astronaut during an extravehicular activity. Abbreviation: 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. |
| EMU abbr.
|
| 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. |
| EMU
Abbreviation of electromagnetic unit |
| emu electromagnetic unit |
EMU
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