Chronic breakdown of cartilage in the joints

• The most common form of arthritis occurring usually after middle age

Wiktionary Word definitions in Wiktionary
n. (context pathology English) A form of arthritis, affecting mainly older people, caused by chronic degeneration of the cartilage and synovial membrane of the joints, leading to pain and stiffness.

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ A more recent trial in osteoarthritis showed no effect from Rhus toxicodendron when compared with placebo. ▪ More than 1,000,000 people in Britain suffer from rheumatoid arthritis and a further five million have osteoarthritis ...

WordNet Word definitions in WordNet
n. chronic breakdown of cartilage in the joints; the most common form of arthritis occurring usually after middle age [syn: degenerative arthritis , degenerative joint disease ]

Wikipedia Word definitions in Wikipedia
Osteoarthritis ( OA ) is a type of joint disease that results from breakdown of joint cartilage and underlying bone . The most common symptoms are joint pain and stiffness. Initially, symptoms may occur only following exercise, but over time may become ...