NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,812 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.

hypofractionation
(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.