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1. Any of several perennial Eurasian artemisias, especially Artemisia cina and A. maritima, having aromatic leaves and numerous flower heads that yield santonin.
2. The dried unopened flower heads of this plant.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.