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| invertebrate phylum with characteristic stinging structures |
| phylum of worms comprised of parasitic and free-living nonparasitic species |
Aschelminthes Asc·hel·min·thes (āsk'hěl-mĭn'thēz')
n.
A phylum of the Metazoa that includes nematodes and other roundworms that are nonsegmented, bilaterally symmetrical, and cylindrical in form, with a pseudocele body cavity and rounded or pointed ends.