nematode
C2Technical/Scientific
Definition
Meaning
A type of slender, unsegmented, cylindrical worm, many of which are parasitic.
Any member of the phylum Nematoda, a diverse group of roundworms found in nearly every environment, including soil, water, and as parasites in plants, animals, and humans.
Linguistics
Semantic Notes
The term is almost exclusively used in biological, agricultural, and medical contexts. In everyday language, people might use the more general term 'worm' or the specific name of a parasitic type (e.g., 'hookworm').
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are consistent.
Connotations
Neutral scientific term in both varieties.
Frequency
Equally low-frequency in general discourse but standard in relevant technical fields in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
The [crop] was damaged by nematodes.Researchers identified a new nematode species.The soil is infested with parasitic nematodes.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms for this technical term]”
Usage
Context Usage
Business
Rare, except in agricultural supply or biotech companies (e.g., 'Our new treatment targets soil nematodes.').
Academic
Common in biology, agriculture, veterinary science, and medicine research papers and textbooks.
Everyday
Very rare. Might be used by gardeners or pet owners dealing with specific infestations.
Technical
The primary register. Used precisely to refer to organisms in the phylum Nematoda.
Examples
By Part of Speech
verb
British English
- [No standard verb form]
American English
- [No standard verb form]
adverb
British English
- [No standard adverb form]
American English
- [No standard adverb form]
adjective
British English
- The nematode population in the field has increased.
- They studied nematode genetics.
American English
- A nematode infection can devastate crops.
- The research focused on nematode behavior.
Examples
By CEFR Level
- [Too technical for A2]
- The farmer found tiny worms, called nematodes, in the soil.
- Some nematodes can make animals sick.
- Gardeners sometimes need to treat soil to control harmful nematodes.
- The scientist examined the nematode under a powerful microscope.
- The persistence of root-knot nematodes poses a significant challenge to sustainable agriculture.
- Caenorhabditis elegans, a free-living nematode, is a cornerstone model organism in genetic research.
Learning
Memory Aids
Mnemonic
Think of a NEedle-like MAn TOAD? No! It's a NEedle-like worm (nema- from Greek for 'thread') that invades a TOE (toad/toe soundalike) or other body part.
Conceptual Metaphor
Often conceptualized as an INVADER or PEST (in crops/animals) or a MODEL ORGANISM (in genetics research, e.g., C. elegans).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'немой' (mute). The root is Greek, not Slavic.
- The Russian equivalent 'нематода' is a direct cognate, so translation is straightforward in scientific contexts.
Common Mistakes
- Mispronouncing it as /niːˈmeɪ.təʊd/ (nee-MAY-toad).
- Using it as a general term for any worm.
- Misspelling as 'nemotode'.
Practice
Quiz
In which field is the term 'nematode' most frequently used?
FAQ
Frequently Asked Questions
No. While many well-known nematodes are parasitic (hooking plants, animals, humans), the majority of nematode species are free-living and play crucial roles in soil and aquatic ecosystems.
No. Earthworms are segmented annelids, generally beneficial for soil. Nematodes are unsegmented roundworms, and many are microscopic pests, though some are beneficial for nutrient cycling.
In British English: /ˈnɛm.ə.təʊd/ (NEM-uh-tohd). In American English: /ˈnɛm.ə.toʊd/ (NEM-uh-tohd). The stress is on the first syllable.
Yes. Several parasitic nematodes infect humans, such as roundworms, hookworms, pinworms, and the worms that cause trichinosis and river blindness. These are often referred to by their specific names rather than just 'nematode' in medical contexts.