NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,800 terms related to cancer and medicine.
Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.
- cancer cluster
- listen (KAN-ser KLUS-ter)
The occurrence of a larger-than-expected number of cases of cancer within a group of people in a geographic area over a period of time.