Source : Webster's Revised Unabridged Dictionary (1913)

Cassowary \Cas"so*wa*ry\, n.; pl. {Cassowaries}. [Malay
   kasu[=a]ri.] (Zo["o]l.)
   A large bird, of the genus {Casuarius}, found in the east
   Indies. It is smaller and stouter than the ostrich. Its head
   is armed with a kind of helmet of horny substance, consisting
   of plates overlapping each other, and it has a group of long
   sharp spines on each wing which are used as defensive organs.
   It is a shy bird, and runs with great rapidity. Other species
   inhabit New Guinea, Australia, etc.

Source : WordNet®

cassowary
     n : large black flightless bird of Australia and New Guinea
         having a horny head crest