~ 1
■ noun a large flightless fast-running Australian bird resembling the ostrich, with shaggy grey or brown plumage, bare blue skin on the head and neck, and three-toed feet. [ Dromaius novaehollandiae .]
Origin
C17 (orig. denoting the cassowary, later the greater rhea): from Port. ema .
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~ 2
■ abbreviation Brit.
1》 electric multiple unit (railway vehicle).
2》 electromagnetic unit(s).