knapweed Hear it!

knapweed definition

knap·weed (nap′wēd′)

noun

any of several weedy plants (genus Centaurea) of the composite family; esp., a hardy perennial (C. nigra) with heads of rose-purple flowers

Etymology: earlier knopweed: see knop & weed

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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