Stru·thi·o n.; pl. Struthiones Zool. A genus of birds including the African ostriches.
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Stru·thi·o·nes n. pl. Zool. (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 Ratitae, or Dromaeognathae.
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