Nematoda /Nem·a·to·da/ (nem″ah-to´dah) a class of helminths (phylum Aschelminthes), the roundworms, many of which are parasites; in some classifications, considered to be a phylum, and sometimes known as Nemathelminthes, or a class of that phylum.
roundworm [round´werm]
Nem·a·to·da (n m  -t  d)n. A phylum of worms including species parasitic in humans and plants as well as free-living nonparasitic species in soil or water. It includes the intestinal roundworms and filarial roundworms. |
roundworm [round´werm]
any member of the class nematoda, somewhat resembling common earthworms in appearance; many are found as parasites in humans or other animals. Those most frequently infecting humans include Ascaris lumbricoides (see ascariasis); Enterobius vermicularis (the pinworm; see enterobiasis); the hookworm (see hookworm disease); the filaria (see filariasis); and the trichina (see trichinosis).
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