Cockatoo
n.
A bird of the Parrot family, of the subfamily Cacatuinæ , having a short, strong, and much curved beak, and the head ornamented with a crest, which can be raised or depressed at will. There are several genera and many species; as the broad-crested cockatoo ( Plictolophus cristatus or Cacatua cristatus ), the sulphur-crested ( Cacatua galerita or Plictolophus galeritus ), etc. The palm cockatoo or great black cockatoo of Australia is Probosciger aterrimus (formerly Microglossus aterrimus ).
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