knotweed

[ not-weed ]

/ ˈnɒtˌwid /

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noun

any of several knotty-stemmed plants belonging to the genus Polygonum, of the buckwheat family.

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Origin of knotweed

First recorded in 1570–80; knot¹ + weed¹

Words nearby knotweed

knot stitch, knotted, knotter, knotting, knotty, knotweed, knotwork, knout, know, knowable, know-all

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use knotweed in a sentence

There are many edible invasive plants and weeds out there, like knotweed and some species of pokeweed.
How to forage your way through your neighborhood|Ellen Airhart|September 18, 2021|Popular-Science
Japanese knotweed, for all its invasive attributes, was an ornamental plant for the Victorians.
The Best of Brit Lit|Peter Stothard|December 17, 2010|DAILY BEAST
It is Polygonum Virginicum, and so far without a common name, unless Virginia knotweed be satisfactory.
Seed Dispersal|William J. Beal
Those of us who are gardeners will certainly agree that “unfortraedde” is the right name for knotweed.
The Old English Herbals|Eleanour Sinclair Rohde

A common roadside flower is the Pink Knotweed, with its branching stems and groups of bright pink flowers.
Woodcraft|Alan Douglas

British Dictionary definitions for knotweed

knotweed

/ (ˈnɒtˌwiːd) /

noun

any of several polygonaceous plants of the genus Polygonum, having small flowers and jointed stems

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012