Ratitae
Ratitae (rȧ*tī"te) , noun, plural
[New Latin, from Latin ratis a raft; compare Latin ratitus marked with the figure of a raft.]
(Zoology) An order of birds in which the wings are small, rudimentary, or absent, and the breastbone is destitute of a keel. The ostrich, emu, moa, and apteryx are examples.