arthritis /ɑɚˈθraɪtəs/ noun Learner's definition of ARTHRITIS
[noncount] medical
: a disease that causes the joints of the body to become swollen and painful关节炎 — see also rheumatoid arthritis — arthritic
/ɑɚˈθrɪtɪk/ adjective [more arthritic; most arthritic]
— arthritic
noun, plural arthritics [count]