Definitions for knapweedˈnæpˌwid

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Random House Webster's College Dictionary

knap•weedˈnæpˌwid(n.)

  1. any composite plant of the genus Centaurea, esp. the weedy C. nigra, having rose-purple flowers set on a dark-colored, knoblike bract.

    Category: Plants

Origin of knapweed:

1400–50; late ME knopwed=knoppe a small rounded protuberance +weed1

Princeton's WordNet

  1. knapweed(noun)

    any of various plants of the genus Centaurea having purple thistlelike flowers

Wiktionary

  1. knapweed(Noun)

    Any of various common weeds of the genus Centaurea, especially Centaurea nigra.

  2. Origin: Alteration of knopweed.

Webster Dictionary

  1. Knapweed(noun)

    the black centaury (Centaurea nigra); -- so called from the knoblike heads of flowers. Called also bullweed


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