NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,863 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.

beta hemolytic streptococcus group B
(BAY-tuh HEE-moh-LIH-tik STREP-toh-KAH-kus ...)
A type of bacterium often found in the vagina. It can cause systemic infections in people with suppressed immune systems.