noun
: any of several diseases (as rheumatoid arthritis, rheumatic fever, fibrositis) characterized by inflammation and pain in muscles or joints from various causes
noun
: any of several diseases (as rheumatoid arthritis, rheumatic fever, fibrositis) characterized by inflammation and pain in muscles or joints from various causes
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012