[ek-uh-ney-shuh, -see-uh]
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. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
echinacea (ˌɛkɪˈneɪʃɪə)
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]

Collins English Dictionary - Complete & Unabridged 10th Edition
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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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