knotweed

noun
knot·​weed | \ ˈnät-ˌwēd How to pronounce knotweed (audio) \

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

Examples of knotweed in a Sentence

Recent Examples on the Web Also prevalent are Callery pear, better known as the Bradford pear, wintercreeper, Canada thistle, garlic mustard, burning bush, multiflora rose, autumn olive, Japanese honeysuckle and Japanese knotweed. John Tuohy, The Indianapolis Star, "Volunteers seek to clear White River banks in Hamilton County of invasive plants," 9 Nov. 2020 Many of those weedy species are also invasive, including Scotch broom, dandelions, Himalayan blackberry and Japanese knotweed, among others. Alison Mcafee, Scientific American, "The Problem with Honey Bees," 4 Nov. 2020 As knotweed clearly demonstrates, theI didn’t y are adept at traveling. Barry Estabrook, WSJ, "Two Books on Creatures Invasive and Incredible," 9 Oct. 2020 Sapsucking psyllid insects from Japan have been imported there to chew through stands of Japanese knotweed. Barry Estabrook, WSJ, "Two Books on Creatures Invasive and Incredible," 9 Oct. 2020 That’s because the massive root system of Japanese knotweed stores huge amounts of energy for regenerating. Ellen Nibali, baltimoresun.com, "Garden Q&A: How to control Japanese knotweed and prune a dogwood," 13 Aug. 2020 Search ‘Japanese knotweed’ on the Home and Garden Information Center website. Ellen Nibali, baltimoresun.com, "Garden Q&A: How to control Japanese knotweed and prune a dogwood," 13 Aug. 2020 This spring, bundles of tender, young knotweed and pokeweed shoots will be appearing tentatively at greenmarkets. Marie Viljoen/saveur, Popular Science, "Ten weeds you can eat," 19 Apr. 2020 Down the steep bank and through dog-hair stands of invasive knotweed, the river opens up to a huge slow pool below and a riffle above. Dave Hurteau, Field & Stream, "John’s Rock: Trout Fishing with an Old Friend," 9 Mar. 2020

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

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First Known Use of knotweed

1884, in the meaning defined above

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Time Traveler for knotweed

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The first known use of knotweed was in 1884

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Cite this Entry

“Knotweed.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/knotweed. Accessed 20 Jan. 2021.

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