NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,176 terms related to cancer and medicine.

We offer a widget that you can add to your website to let users look up cancer-related terms. Get NCI’s Dictionary of Cancer Terms Widget.

Physician Data Query
(fih-ZIH-shun DAY-tuh KWEER-ee)
Physician Data Query is an online source of cancer information that is developed and maintained by the National Cancer Institute (NCI). It makes current, credible, and accurate cancer information available to health professionals and the public. Physician Data Query contains information about cancer treatment, supportive and palliative care, screening, prevention, genetics, and integrative, complementary, and alternative medicine. This information is updated with the most recent evidence from scientific research. Physician Data Query also contains drug information summaries on many cancer-related drugs; dictionaries of cancer terms, drug terms, and genetics terms; and a directory of professionals who provide genetics services. Most of this information and more specific information about Physician Data Query can be found on the NCI's website at Also called PDQ.