root knot

noun

: a plant disease caused by nematodes that produce enlargements on the roots and stunt the growth of the plant

Examples of root knot in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Try to find a spot for new okra plantings where root knot nematodes have not affected previous crops. Tom MacCubbin, The Orlando Sentinel, 14 June 2025 Looking for varieties that resist root knot nematode or verticillium wilt or early blight or other common tomato problems? Nan Sterman, San Diego Union-Tribune, 5 Apr. 2025 University studies report the annual periwinkle is resistant to some forms of root knot nematode. Tom MacCubbin, Orlando Sentinel, 29 June 2024

Word History

First Known Use

1888, in the meaning defined above

Time Traveler
The first known use of root knot was in 1888

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Cite this Entry

“Root knot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/root%20knot. Accessed 9 Sep. 2025.

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