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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.
[By folk etymology (influenced by stave acre) from Middle English staphisagre, from Latin staphis agria, from Greek staphis agriā (literally, "wild raisin," from the raisinlike appearance of the seeds ) : staphis, raisin, stavesacre (from variant of earlier astaphis, raisin; perhaps akin to staphulē, bunch of grapes; see staphylo-) + agriā, feminine of agrios, wild; see agro- in Indo-European roots.]
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.
1. (Plants) a Eurasian ranunculaceous plant, Delphinium staphisagria, having purple flowers and poisonous seeds
2. (Plants) the seeds of this plant, which have strong emetic and cathartic properties
[C14 staphisagre, from Latin staphis agria, from Greek, from staphis raisin + agria wild]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014