Definition of psittacosis noun from the Oxford Advanced Learner's Dictionary

 

psittacosis

 noun
noun
BrE BrE//ˌsɪtəˈkəʊsɪs//
 
; NAmE NAmE//ˌsɪtəˈkoʊsɪs//
 
[uncountable](medical)
 
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a disease of birds, especially parrots, which causes pneumonia (= a disease of the lungs) in humans Word Origin late 19th cent.: from Latin psittacus ‘parrot’ + -osis.
See the Oxford Advanced American Dictionary entry: psittacosis