osteoarthritis[äs′tē ō är t̸hrīt′is]
a slowly progressive form of arthritis, found chiefly in older people, characterized by cartilage deterioration and bone enlargement
Origin of osteoarthritisosteo- + arthritis
A form of arthritis, occurring mainly in older persons, that is characterized by chronic degeneration of the cartilage of the joints. Also called degenerative joint disease.
top: normal joint
bottom: osteoarthritic joint