knotweed

noun knot·weed \ ˈnät-ˌwēd \
|Updated on: 6 Jul 2018

Definition of knotweed

: any of several herbs (genus Polygonum) of the buckwheat family with leaves and bracts jointed and having a very short petiole; broadly : polygonum

Recent Examples of knotweed from the Web

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First Known Use of knotweed

1884

in the meaning defined above

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