rheumatoid arthritis

Từ điển Oxford Advanced Learner 8th

rheuma·toid arth·ritis [rheumatoid arthritis] BrE [ˌruːmətɔɪd ɑːˈθraɪtɪs] NAmE [ˌruːmətɔɪd ɑːrˈθraɪtɪs] noun uncountable (medical)
a disease that gets worse over a period of time and causes painful swelling and permanent damage in the joints of the body, especially the fingers, wrists, feet and ankles