knotweed

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noun knot·weed \ˈnät-ˌwēd\

Definition of knotweed

  1. :  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

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