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|Noun||1.||rheumatoid spondylitis - a chronic form of spondylitis primarily in males and marked by impaired mobility of the spine; sometimes leads to ankylosis|
autoimmune disease, autoimmune disorder - any of a large group of diseases characterized by abnormal functioning of the immune system that causes your immune system to produce antibodies against your own tissues
spondylitis - inflammation of a spinal joint; characterized by pain and stiffness