root knot


Definition of root knot

: 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 The plants have likely accumulated powdery mildew, root knot nematodes, and countless other vegetable plant afflictions. Nan Sterman, San Diego Union-Tribune, 4 Sep. 2021 Next year, replant those beds with melons, pumpkins, basil, sweet potatoes (Ipomea), okra, onions and other veggies that are not susceptible to root knot nematode or any other nightshade pathogens. Nan Sterman, San Diego Union-Tribune, 4 Sep. 2021 One of the tricks is to find an area in full sun that has not had root knot nematodes. Tom Maccubbin,, 23 Mar. 2018

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

See More

First Known Use of root knot

1888, in the meaning defined above

Learn More About root knot

Time Traveler for root knot

Time Traveler

The first known use of root knot was in 1888

See more words from the same year

Dictionary Entries Near root knot


root knot

root-knot nematode

See More Nearby Entries 

Statistics for root knot

Cite this Entry

“Root knot.” Dictionary, Merriam-Webster, Accessed 23 Jan. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
Spell It

Can you spell these 10 commonly misspelled words?

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!