Definitions from Wiktionary ( )

▸ noun:  (obsolete) A cassowary (genus Casuarius).
▸ noun:  A large flightless bird native to Australia, Dromaius novaehollandiae.
▸ noun:  A dark constellation in Southern Celestial Hemisphere, Dome of the Sky; A constellation or asterism from Australian aborigine cultures, a dark constellation pattern formed by an arrangement of dark nebulae in the sky, blotting out background stars, appearing akin to the emu giant bird of Australia.
▸ noun:  (physics) Initialism of electromagnetic unit. [Any of the various units to measure electricity and magnetism in the CGS (now replaced by SI) system of units; abbreviated emu, e.m.u., or EMU.]
▸ noun:  (computing, video games, informal) Clipping of emulator. [A person or thing that emulates.]
▸ noun:  (European Union) Initialism of European Monetary Union.
▸ noun:  Initialism of Eastern Mennonite University.
▸ noun:  (computing) Initialism of English metric unit (“1/360,000-th of a centimetre, or, 1/914400-th of an inch”).
▸ noun:  (rail transport, countable) Initialism of electric multiple unit. [(rail transport) A multiple unit train powered by electricity, abbreviated EMU.]
▸ noun:  (cgs) Alternative form of emu or e.m.u.; Initialism of electromagnetic unit.
▸ noun:  (automotive engineering) Initialism of engine management unit.
▸ noun:  (astronautics) Initialism of extravehicular mobility unit (“spacesuit”).
▸ noun:  (economics) Initialism of economic and monetary union.

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