osteoarthritis
osteo·arth·ritis [osteoarthritis] BrE [ˌɒstiəʊɑːˈθraɪtɪs] NAmE [ˌɑːstioʊɑːrˈθraɪtɪs] noun uncountable (medical) a disease that causes painful swelling and permanent damage in the joints of the body, especially the hips, knees and thumbs
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