NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,041 terms related to cancer and medicine.

purple coneflower
(PER-pul KONE-flow-er)
An herb native to North America that has been used to prevent and treat the common cold and other respiratory infections. Purple coneflower may interfere with treatment that uses the immune system to fight cancer. The scientific names are Echinacea purpurea and Echinacea angustifolia. Also called echinacea.