emu

noun4

1. •
   A large flightless bird native to Australia, Dromaius novaehollandiae.

   • From New Holland the emeu, / With his better moiety, / Has paid a visit to the Zo- / ological Society. — 1829
2. •
   Initialism of electromagnetic unit.

   • A bar magnet NS has poles of strength 144 emu, 5 cm apart. — 1941
3. •
   (informal) Clipping of emulator.
4. •
   (no longer used) A cassowary (genus Casuarius).

   • [page 1] 1. EGGES. Cassawary, or Emeu, vide Aldrov: p. 542. Harveum, G.A. p. 61. […] [page 3] 4. CLAWES. […] A legge and claw of the Cassawary or Emeu that dyed at S. James’s, Westminster. — 1656

noun5

1. •
   Initialism of economic and monetary union.
2. •
   Initialism of electric multiple unit.
3. •
   Initialism of extravehicular mobility unit (“spacesuit”).
4. •
   Initialism of engine management unit.
5. •
   Initialism of English metric unit (“1/360,000-th of a centimetre, or, 1/914400-th of an inch”).