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.

false-negative test result
(... NEH-guh-tiv ... reh-ZULT)
A test result that indicates that a person does not have a specific disease or condition when the person actually does have the disease or condition.