·pl of Struthio.
II. Struthiones ·noun ·pl A division, or order, of birds, including only the African ostriches.
III. Struthiones ·noun ·pl 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.