NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,791 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 (kum-PUL-zhun)
- An uncontrollable urge to say or do something without an obvious reason. A person may repeat a behavior, such as hand-washing, over and over.