knapweed

noun
knap·weed | \ˈnap-ˌwēd \

Definition of knapweed 

: any of various weedy centaureas especially : a widely naturalized European perennial (Centaurea nigra) with tough wiry stems and knobby heads of purple flowers

Examples of knapweed in a Sentence

Recent Examples on the Web

Invasives mainly on roadsides: Cutleaf teasel, wild parsnip,spotted knapweed, phragmites, leafy spurge, Canada thistle and crown vetch. Joanne Kempinger Demski, Milwaukee Journal Sentinel, "Invasive plants to watch out for," 20 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'knapweed.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of knapweed

15th century, in the meaning defined above

History and Etymology for knapweed

Middle English knopwed, from knop knop + wed weed

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Dictionary Entries near knapweed

knapsack

knapsack sprayer

knapscull

knapweed

knarl

knarry

knat

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The first known use of knapweed was in the 15th century

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