echinacea

[ek-uh-ney-shuh, -see-uh]
noun
any of several coneflowers of the genus Echinacea whose leaves, roots, and other parts are used in herbal medicine to promote wound healing and enhance the immune system.
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echinacea (ˌɛkɪˈneɪʃɪə)
 
n
1.  See coneflower Also called: purple coneflower either of the two N American plants of the genus Echinacea, having flower heads with purple rays and black centres: family Compositae (composites)
2.  the powdered root of either of these plants, used to stimulate the immune system
 
[from New Latin, from Latin echīnātus prickly, from echīnus hedgehog]

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Example sentences
Echinacea is a herb that has been promoted as a natural way for preventing colds and the flu, and for making symptoms less severe.
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