Definitions for knapweedˈnæpˌwid
This page provides all possible meanings and translations of the word knapweed
Random House Webster's College Dictionary
any composite plant of the genus Centaurea, esp. the weedy C. nigra, having rose-purple flowers set on a dark-colored, knoblike bract.
Origin of knapweed:
1400–50; late ME knopwed=knoppe a small rounded protuberance +weed1
any of various plants of the genus Centaurea having purple thistlelike flowers
Any of various common weeds of the genus Centaurea, especially Centaurea nigra.
Origin: Alteration of knopweed.
the black centaury (Centaurea nigra); -- so called from the knoblike heads of flowers. Called also bullweed
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