- A phylum of worms, having a long, round, and generally smooth human body; the roundworms. Called additionally Nematodea, and more frequently Nematoda. Previously, it was classed as a taxonomic order.
- An order of Nemathelminthes, or course of Vermes, having a mouth and an alimentary canal and split sexes, and being usually parasitic; the nematoid worms; the roundworms and threadworms.
Sentence for "Nematoidea"
- Small specimens have been found beneath…
Variant for "Nematoidea"