Definition of "arthritis" []

• Inflammation of a joint, usually accompanied by pain, swelling, and stiffness, and resulting from infection, trauma, degenerative changes, metabolic disturbances, or other causes. It occurs in various forms, such as bacterial arthritis, osteoarthritis, or rheumatoid arthritis. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "_Metastatic arthritis_ is seen more frequently in colts or young animals than in mature horses and we here take the liberty of classifying with the arthritis of omphalophlebitis and strangles the so-called rheumatic variety."
• "_Rheumatic arthritis_, if one is justified in classifying rheumatic inflammation of joints as a metastatic form of arthritis, is not a common condition, though seen in mature and aged animals."
• "The commoner types include the _synovitis_ associated with disease in the adjacent bone, _acute arthritis of infants_, joint suppuration in _pyæmia_, _pyogenic arthritis_ following upon penetrating wounds, and the affections which result from _gonorrhœal_ or _pneumococcal_ infection."