NCI Dictionary of Cancer Terms

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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.

radiopharmaceutical
(RAY-dee-oh-FAR-muh-SOO-tih-kul)
A drug that contains a radioactive substance and is used to diagnose or treat disease, including cancer. Also called radioactive drug.