from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
Sorry, no etymologies found.
He had found a giant flightless bird known as Casuarius casuarius—more familiarly, the Australian cassowary.