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.

measles virus
(MEE-zulz VY-rus)
The virus that causes measles (a highly contagious disease marked by fever, cough, and raised red spots on the skin). The measles virus usually affects children, and is spread by coughing or contact with fluid from the nose or mouth of someone who has been infected.