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hypericin

[ hī-pĕrĭ-sĭn ]
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n.

A drug, produced synthetically or as an extract of Saint John's wort, used as an antidepressant and antiviral agent.

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“Evoke” and “invoke” both derive from the same Latin root “vocāre.”

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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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