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orology
OROM
Oromo
Orono
Orontes
oropendola
oropharynx
orotund
Oroya fever
orphan
orphan assets
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ornithosis
or·ni·tho·sis [ àwrnə thṓssiss ]


noun 
Definition:
 
disease: the bacterial disease psittacosis, especially when contracted by humans from birds
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