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1. A delphinium (Delphinium staphisagria) of southern Europe, having purple or blue flowers.
2. The poisonous seeds of this plant, formerly used medicinally especially to kill external parasites such as lice.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.