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roundworm |
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roundworm, another name for a nematode. See phylum Nematoda Nematoda (nĕm'ətōd`ə) ..... Click the link for more information. . nematodeor roundwormAny of more than 15,000 named and many more unnamed species of worms in the class Nematoda (phylum Aschelminthes). Nematodes include plant and animal parasites and free-living forms found in soil, freshwater, saltwater, and even vinegar and beer malts. They are bilaterally symmetrical and usually tapered at both ends. Some species have separate sexes; others are hermaphroditic. They range from microscopic to about 23 ft (7 m) long. Nematode parasites can occur in almost any body organ but are most common in the digestive, circulatory, or respiratory system. Hookworms, pinworms, and eelworms are nematodes. See also filarial worm, guinea worm, trichina.roundworm any nematode worm, esp Ascaris lumbricoides, a common intestinal parasite of man and pigs roundworm [′rau̇nd‚wərm] (invertebrate zoology) The name applied to nematodes. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Raccoon roundworms (Baylisascaris procyonis): a cause of animal and human disease. It exterminates fleas and roundworms while preventing filarial infection. Neither, it turns out, do sting nematodes--small, parasitic roundworms that siphon food from plant roots. |
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