pl of struthio.
2. struthiones ·noun ·pl a division, or order, of birds, including only the african ostriches.
3. 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.