Definition that contains iwis
- flightless bird flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
- genus apteryx type genus of the Apterygidae: kiwis
- ratite flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
- order apterygiformes a ratite bird order: flightless ground birds having vestigial wings and long bills and small eyes: kiwis
- apterygiformes a ratite bird order: flightless ground birds having vestigial wings and long bills and small eyes: kiwis
- ratite bird flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds