NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,855 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.
- listen (ay-ZOK-see-MEH-thayn)
- A substance that is used in cancer research to cause colon tumors in laboratory animals. This is done to test new diets, drugs, and procedures for use in cancer prevention and treatment.