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Definition of rheumatoid arthritis noun from the Oxford Advanced Learner's Dictionary

rheumatoid arthritis

noun
 
/ˌruːmətɔɪd ɑːˈθraɪtɪs/
 
/ˌruːmətɔɪd ɑːrˈθraɪtɪs/
[uncountable] (medical)
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  1. a disease that gets worse over a period of time and causes painful swelling (= the condition of being larger than normal) and permanent damage in the joints of the body, especially the fingers, wrists, feet and ankles
See rheumatoid arthritis in the Oxford Advanced American Dictionary
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