Dromaeognathae

Struthiones Stru`thi*o"nes, n. pl. [NL. See {Struthio}.] (Zo["o]l.) (a) A division, or order, of birds, including only the African ostriches. (b) In a wider sense, an extensive group of birds including the ostriches, cassowaries, emus, moas, and allied birds incapable of flight. In this sense it is equivalent to {Ratit[ae]}, or {Drom[ae]ognath[ae]}. [1913 Webster]