a slowly progressive form of arthritis, found chiefly in older people, characterized by cartilage deterioration and bone enlargement
See osteoarthritis in American Heritage Dictionary 4
(ŏsˌtē-ō-är-thrīˈtĭs)
noun
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.