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A North American perennial herb (Agastache foeniculum) in the mint family, having spikes of violet-blue flowers and aromatic leaves sometimes used for tea.
[Probably from the fragrance of its seeds.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.