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knapweed |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Knapweed \Knap"weed`\, n. (Bot.) The black centaury ({Centaurea nigra}); -- so called from the knoblike heads of flowers. Called also {bullweed}. From WordNet r 1.6 [wn]: knapweed n : any of various plants of the genus Centaurea having purple thistlelike flowers
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