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1. An Australian cockatoo (Eolophus roseicapillus syn. Cacatua roseicapilla) having pale blue-gray plumage and a pink breast. Also called rose-breasted cockatoo.
2. Australian A fool; an idiot.

[Yuwaalaraay (Pama-Nyungan language of southeast Australia) gilaa.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Animals) an Australian cockatoo, Kakatoe roseicapilla, having grey wings, back, and crest and a pink body
2. slang Austral a fool or simpleton
[C19: from a native Australian language]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



1. an Australian cockatoo, Kakatoe roseicapilla, having rose-colored underparts.
2. Australian. a fool.
[1885–90; < Yuwaalaraay (Australian Aboriginal language of N New South Wales)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Abstract: A 9-year-old female rose-breasted cockatoo (Eolophus roseicapilla) was presented for a humeral fracture.
Richardson, "Fine structure of the pecten oculi in the Australian galah (Eolophus roseicapillus) (Aves)J Histology and Histopathology, vol.
Herniation of the abdominal musculature has been reported in a variety of avian species including pigeons (Columba livia), (6) ducks (Anas acuta, Anas platyrhynchos), (7,8) turkeys, (9) cockatiels (Nymphicus hollandicus), (10) a red lory (Eos bornea), (11) budgerigars (Melopsittacus undulatus), (12) sulfur-crested cockatoos (Cacatua galerita), (12,13) and galahs (Eolophus roseicapella).
The 11 cases comprised 6 African grey parrots (Psittacus erithacus erithacus), 1 peach-faced lovebird (Agapornis roseicollis), 1 galah (Eolophus roseicapilla), 1 Goffin's cockatoo (Tanimbar corella) (Cacatua goffiniana), 1 Moluccan cockatoo (Cacatua moluccensis), and 1 Senegal parrot (Poicephalus senegalus).
Avian genotype II was found in Major Mitchell's cockatoos (Cacatua leadbeateri), cockatiels, eclectus parrots (Eclectus roratus), a galah (Eolophus roseicapilla), and a sun conure (Aratinga solstitialis), whereas avian genotype III was found in cockatiels, princess parrots (Polytelis alexandrae), a galah, and a sun conure.
The cockatoo group comprised the following species: blue-eyed cockatoo (Cacatua ophthalmica), Ducorps's cockatoo (Cacatua ducorpsii), galah (Eolophus roseicapilla), little corella (Cacatua sanguined), Moluccan cockatoo (Cacatua moluccensis), pink cockatoo (Cacatua leadbeateri), sulphur-crested cockatoo (Cacatua galerita), Tanimbar cockatoo (Cacatua goffini), white cockatoo (Cacatua alba), and yellow-crested cockatoo (Cacatua sulphured).
Reports of avian species with osteosarcoma include budgerigars (.Melopsittacus undulatus), an umbrella cockatoo, a rose-breasted cockatoo (Eolophus roseicapilla), a blue-and-gold macaw (Ara ararauna), an American robin (Turdus migratorius), a blue-fronted Amazon, a Toulouse grey goose, and a Panama boat-billed heron (8,9,11,13,15-17,29) To our knowledge, this is the first report of appendicular osteosarcoma in a ring-necked dove.
Interstitial melanin was present in the testicles of all large cockatoo species (1 Eolophus roseicapillus; 3 Cacatua species), and, in an Australian king parrot (Alisterus scapularis), a superb parakeet (Polytelis swainsonii) and, to a lesser degree, a blue-and-gold macaw (Ara ararauna).
This is true especially in cockatoos (Cacatua and Eolophus species), which seem to have a higher prevalence in the sum of reported cases (62%, 8 of 13 cases).
Jaensch et al (12) examined the effects of partial hepatectomy on plasma enzyme concentrations and galactose clearance tests in galahs (Eolophus roseicapillus).
Heightened responsiveness to female-initiated displays in an Australian cockatoo, the galah (Eolophus roseicapillus).
Abstract: To evaluate the health and nutritional status of 3 wild Australian psittacine species, plasma and hepatic mineral concentrations and plasma biochemical values were measured in wild-caught galahs (Eolophus roseicapilla), long-billed corellas (Cacatua tenuirostris), and sulphur-crested cockatoos (Cacatua galerita).