NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,777 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 (HY-poh-FRAK-shuh-NAY-shun)
- A treatment schedule in which the total dose of radiation is divided into large doses and treatments are given once a day or less often.