cockatiel

n. (Zool.) A small gray and white Australian parrot (Leptolophus hollandicus, formerly Calopsitta Novæ-Hollandiæ) with a prominent crest; the male has bright yellow cheeks and crest, but the female has only a pale yellow in the face; -- it is so called from its note.
Syn. -- cockateel, cockatoo parrot, Nymphicus hollandicus. [ 1913 Webster + WordNet 1.5 ]