Stru·thi·o n.; pl. Struthiones   Zool. A genus of birds including the African ostriches.
  ◄ ►
  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.
  ◄ ►