- Originally, a disease in nonpsittacine birds (domestic fowl, ducks, pigeons, turkeys, and many wild birds) caused by Chlamydia psittaci; now, generally referred to as psittacosis. [G. ornis (ornith-), bird, + -osis, condition]
* * *or·ni·tho·sis .ȯr-nə-'thō-səs n, pl -tho·ses -.sēz PSITTACOSIS esp a form of the disease occurring in or originating in birds (as the turkeys and pigeons) that do not belong to the family (Psittacidae) containing the parrots
* * *n.
* * *or·ni·tho·sis (or″nĭ-thoґsis) [Gr. ornis, ornithos bird + -osis] 1. psittacosis in nonpsittacine birds or humans. 2. any kind of psittacosis.
Medical dictionary. 2011.