Final answer:
Arthritis, which includes conditions like osteoarthritis and rheumatoid arthritis, is the term used for synovial joint inflammation, often causing joint pain, stiffness, and reduced mobility.
Step-by-step explanation:
Synovial joint inflammation is also known as arthritis. Arthritis is a common disorder of synovial joints resulting in significant joint pain, swelling, stiffness, and reduced joint mobility. Among the various types of arthritis, osteoarthritis is the most common, often associated with aging and the 'wear and tear' of the articular cartilage. Another type is rheumatoid arthritis (RA), which is an autoimmune disease leading to joint inflammation and pain. Factors like aging, joint injury, autoimmune diseases, and genetics can contribute to the development of arthritis.