ratite

Relating to or being any of a group of flightless birds having a flat breastbone without the keellike prominence characteristic of most flying birds.

A ratite bird, such as the ostrich or emu.

Raft-breasted, as a bird; having a flat breast-bone or sternum with no keel; having no keel, as a breast-bone; ecarinate; of or pertaining to the.

Of or pertaining to the Ratitæ.

A bird of the order of Struthioniformes, a diverse group of large running, flightless birds, mostly extinct, but including the cassowary, elephant bird, emu, kiwi, moa, ostrich, rhea and tinamou

flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds