tumor (T) /t(y)o̅o̅″mər/ [L] , 1. a swelling or enlargement occurring in inflammatory conditions. 2. a new growth of tissue characterized by progressive, uncontrolled proliferation of cells. The tumor may be localized or invasive, benign or malignant. A tumor may be named for its location, for its cellular makeup, or for the person who first identified it. Also called neoplasm.
