knapweed
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knap·weed
(năp′wēd′)n.
Any of various weedy thistlelike plants in the composite family having flowers grouped in a head with a spiny involucre, especially several species of the genus Centaurea and the Eurasian species Acroptilon repens.
[Middle English knopwed : knop, knob; see knop + wed, weed; see weed1.]
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.
knapweed
(ˈnæpˌwiːd)n
[C15 knopwed; see knop, weed1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
knap•weed
(ˈnæpˌwid)n.
any composite plant of the genus Centaurea, esp. the weedy C. nigra, having rose-purple flowers set on a dark-colored, knoblike bract.
[1400–50; late Middle English knopwed=knoppe a small rounded protuberance + weed1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Noun | 1. | knapweed - any of various plants of the genus Centaurea having purple thistlelike flowers slender knapweed - a variety of knapweed Jersey knapweed - a variety of knapweed centaury - any plant of the genus Centaurea black knapweed, Centaurea nigra, hardheads, lesser knapweed - a weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized Centaurea scabiosa, great knapweed, greater knapweed - tall European perennial having purple flower heads |
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