Eelworm

Definition

A vernacular name for nematodes (phylum Nematoda), referring to their elongated, cylindrical, unsegmented bodies that move with sinuous, eel-like undulations. The term is used especially for plant-parasitic and soil-dwelling species, though it applies broadly to roundworms in agricultural and ecological contexts.

Etymology

From 'eel' (referring to serpentine movement and body shape) + 'worm' (Old English wyrm, a general term for elongated invertebrates).

Example

The potato cyst eelworm (Globodera rostochiensis) is a plant-parasitic nematode that reduces crop yields and alters soil microbial communities, indirectly affecting detritivorous arthropod populations.

Synonyms

• roundworm
• Nematode

Related Terms

• Nematode
• Vermiform
• entomopathogenic nematode
• soil fauna
• helminth
• potato cyst nematode

Usage Notes

Primarily used in agricultural and British English contexts; 'nematode' or 'roundworm' is preferred in scientific literature. Not all nematodes are parasitic—many are free-living predators or detritivores important in soil food webs. The term 'eelworm' may carry negative connotations due to association with crop pests.