Definition of osteoarthritis
: a common form of arthritis typically with onset during middle or old age that is characterized by progressive degenerative changes in the cartilage of one or more joints (as of the knees, hips, and hands) accompanied by thickening and overgrowth of adjacent bone and that is marked symptomatically chiefly by stiffness, swelling, pain, deformation of joints, and loss of range of motion
—abbreviation OA
— compare rheumatoid arthritis
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Merriam-Webster unabridged
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Time Traveler for osteoarthritis
The first known use of osteoarthritis was in 1878
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