- ratite, ratite bird, flightless bird - flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
--1 is a kind of bird
--1 has particulars:ostrich, Struthio camelus; cassowary; emu, Dromaius novaehollandiae, Emu novaehollandiae; kiwi, apteryx; rhea, Rhea americana; rhea, nandu, Pterocnemia pennata; elephant bird, aepyornis; moa