nematode

[nem-uh-tohd]
noun
1.
any unsegmented worm of the phylum Nematoda, having an elongated, cylindrical body; a roundworm.
adjective
2.
pertaining to the Nematoda.

Origin:
1860–65; nemat- + -ode1

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World English Dictionary
nematode (ˈnɛməˌtəʊd)
 
n
nematode worm, Also called: roundworm any unsegmented worm of the phylum (or class) Nematoda, having a tough outer cuticle. The group includes free-living forms and disease-causing parasites, such as the hookworm and filaria

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

nematode
1865, from Mod.L. Nematoda, the class or phylum name, from Gk. nema (gen. nematos) "thread" (from stem of nein "to spin;" see needle) + -ode "in the nature of."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

nematode nem·a·tode (něm'ə-tōd')
n.
A parasitic worm of the class Nematoda. Also called roundworm.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
nematode   (něm'ə-tōd')  Pronunciation Key 
Any of several slender, cylindrical worms of the group Nematoda, which some scientists consider to be a class of the aschelminths and others to be a separate phylum. Most nematodes are tiny and live in enormous numbers in water, soil, plants, and animals. They have a simple structure, with a long hollow gut separated from the body wall by a fluid-filled space. Several nematodes, such as pinworm, roundworm, filaria, and hookworm, are parasites on animals and humans and cause disease. One species, Caenorhabditis elegans (usually called C. elegans), was one of the first animals to have its entire genome sequenced and is important in biological research as a model organism.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences for nematodes
A nematicide is a type of chemical pesticide used to kill parasitic nematodes.
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