nem·​a·​tode | \ˈne-mə-ˌtōd \

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

As such, there are recommended remedies for the problem and one is the use of predatory nematodes. Jeff Lowenfels, Anchorage Daily News, "Here’s what’s eating your currant bushes and ‘spitting’ on your wild roses," 13 July 2018 For these nematodes, the situation is salvageable—because our (s)hero(ine) can self-fertilize. Katherine J. Wu, Smithsonian, "Alternatives to Heterosexual Pairings, Brought to You By Non-Human Animals," 28 June 2018 Beneficial nematodes also work well to curtail immature stages developing in the soil. The Editors Of Organic Life, Good Housekeeping, "How To Control Pesky Cucumber Beetles In Your Garden," 1 June 2017 As for the grubs, parasitic nematodes (Heterorhabditis spp. The Editors Of Organic Life, Good Housekeeping, "How To Defend Your Garden Against Japanese Beetles," 26 Jan. 2018 Establish soil solarization treatments to control nematodes and diseases. Tom Maccubbin,, "May in the garden," 28 Apr. 2018 Soil from the landscape and top soils may contain insects, diseases, nematodes and weeds. Tom Maccubbin,, "Secrets to sunflower success," 2 June 2018 Another way to avoid nematodes is to grow figs in a container. Tom Maccubbin,, "It's easy to grow figs," 23 Mar. 2018 When it was tested on nematode worms infected with the bacteria, the researchers found the same results. Jason Daley, Smithsonian, "New “Immunobiotic” Could Treat Antibiotic-Resistant Superbugs," 6 July 2018

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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Last Updated

24 Oct 2018

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The first known use of nematode was in 1865

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nem·​a·​tode | \ˈnem-ə-ˌtōd \

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

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to clear from alleged fault or guilt

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