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knapweed

[ nap-weed ]
/ ˈnæpˌwid /
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noun
any composite plant of the genus Centaurea, especially the weedy C. nigra, having rose-purple flowers set on a dark-colored, knoblike bract.
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Also called hardheads, Spanish button.

Origin of knapweed

First recorded in 1400–50, knapweed is from the late Middle English word knopwed.See knop, weed1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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British Dictionary definitions for knapweed

knapweed
/ (ˈnæpˌwiːd) /

noun
any of several plants of the genus Centaurea, having purplish thistle-like flowers: family Asteraceae (composites)See also centaury (def. 2), hardheads

Word Origin for knapweed

C15 knopwed; see knop, weed 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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