Source : Webster's Revised Unabridged Dictionary (1913)

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]}.

Struthio \Stru"thi*o\, n.; pl. {Struthiones}. [L., an ostrich,
   fr. Gr. ?.] (Zo["o]l.)
   A genus of birds including the African ostriches.