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

 

osteoarthritis

 noun
noun
BrE BrE//ˌɒstiəʊɑːˈθraɪtɪs//
 
; NAmE NAmE//ˌɑːstioʊɑːrˈθraɪtɪs//
 
[uncountable](medical)
 
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a disease that causes painful swelling and permanent damage in the joints of the body, especially the hips, knees and thumbs
See the Oxford Advanced American Dictionary entry: osteoarthritis