nem·​a·​tode | \ ˈne-mə-ˌtōd How to pronounce nematode (audio) \

Definition of nematode

: any of a phylum (Nematoda or Nemata) of elongated cylindrical worms parasitic in animals or plants or free-living in soil or water

called also roundworm

Examples of nematode in a Sentence

Recent Examples on the Web In one 2013 disaster, a multimillion-dollar research project was destroyed when a greenhouse overheated during a summer power failure, decimating insect and nematode cultures. Teresa Watanabe, Los Angeles Times, 8 Apr. 2021 This week in the garden If your garden soil is infested with nematodes, use one or more of the nematode-resistant tomato varieties such as Tycoon, BHN 968, Celebrity or Valley Cat. Calvin Finch, San Antonio Express-News, 2 Apr. 2021 An example is the clk1 gene in C. elegans, which is known to boost the nematode’s metabolism. Yao-hua Law, Science | AAAS, 25 Mar. 2021 There are many species of round worms (nematodes) that can infest fish. Joe Genzel, Outdoor Life, 27 May 2020 The researchers found the nematodes in lizards from only that first Pyrenees population. Sandrine Ceurstemont, Scientific American, 1 May 2020 Nothing to be done for the contaminated plates or the dying nematodes. New York Times, 18 Feb. 2020 The most important part of soft pest-control in spring is the release of Trichogramma wasps and beneficial nematodes. Howard Garrett, Dallas News, 30 Mar. 2020 Marigolds and Melons Certain marigold varieties control nematodes in the roots of melon without using chemical treatments. The Editors, Good Housekeeping, 24 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nematode.' 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 nematode

1865, in the meaning defined above

History and Etymology for nematode

ultimately from Greek nēmat-, nēma

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Time Traveler for nematode

Time Traveler

The first known use of nematode was in 1865

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Statistics for nematode

Cite this Entry

“Nematode.” Dictionary, Merriam-Webster, Accessed 17 Jun. 2021.

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More Definitions for nematode


nem·​a·​tode | \ ˈnem-ə-ˌtōd How to pronounce nematode (audio) \

Medical Definition of nematode

 (Entry 1 of 2)

: of or relating to the phylum Nematoda



Medical Definition of nematode (Entry 2 of 2)

: any worm of the phylum Nematoda

More from Merriam-Webster on nematode Encyclopedia article about nematode


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