psittacosisPronunciation: /ˌsɪtəˈkəʊsɪs/Definition of psittacosis noun [mass noun] a contagious disease of birds, caused by chlamydiae and transmissible (especially from parrots) to human beings as a form of pneumonia. Origin: late 19th century: from Latin psittacus 'parrot' + -osispsittacosis in other Oxford dictionaries Definition of psittacosis in the US English dictionary
