degenerative arthritis degenerative arthritis /dɪˈdʒɛnərətɪv ɑːrˈθraɪtɪs/

noun

1. Chronic breakdown of cartilage in the joints; the most common form of arthritis occurring usually after middle age  ( degenerative arthritis , degenerative joint disease , osteoarthritis )
   chronic breakdown of cartilage in the joints; the most common form of arthritis occurring usually after middle age