nem·​a·​tode ˈne-mə-ˌtōd How to pronounce nematode (audio)
: 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 University studies report the annual periwinkle is resistant to some forms of root knot nematode. Tom MacCubbin, Orlando Sentinel, 29 June 2024 They're known for repelling a wide variety of pests including the potato beetle, nematodes, whiteflies, and thrips. Heather Bien, Southern Living, 27 June 2024 In separate lab experiments over the past decade, rapamycin has been found to extend the lifespan of yeast, nematodes, fruit flies, and mice. Jacob Sweet, Vox, 8 May 2024 Beneficial nematodes can be applied to a lawn where white grubs feed, which will infect them with deadly parasites. Miri Talabac, Baltimore Sun, 2 May 2024 See all Example Sentences for nematode 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'nematode.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


ultimately from Greek nēmat-, nēma

First Known Use

1865, in the meaning defined above

Time Traveler
The first known use of nematode was in 1865

Dictionary Entries Near nematode

Cite this Entry

“Nematode.” Dictionary, Merriam-Webster, Accessed 21 Jul. 2024.

Kids Definition


nem·​a·​tode ˈnem-ə-ˌtōd How to pronounce nematode (audio)
: any of a major group of long cylinder-shaped worms that are parasites in animals or plants or live in soil or water

called also roundworm

Medical Definition


1 of 2 adjective
nem·​a·​tode ˈnem-ə-ˌtōd How to pronounce nematode (audio)
: of or relating to the phylum Nematoda


2 of 2 noun
: any worm of the phylum Nematoda

More from Merriam-Webster on nematode

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