roundworm

American  

[raund-wurm] / ˈraʊndˌwɜrm /

noun

1. any nematode, especially Ascaris lumbricoides, that infests the intestine of humans and other mammals.

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roundworm British  

/ ˈraʊndˌwɜːm /

noun

1. any nematode worm, esp Ascaris lumbricoides , a common intestinal parasite of man and pigs

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Etymology

Origin of roundworm

First recorded in 1555–65; round ¹ + worm

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Compare meaning

How does roundworm compare to similar and commonly confused words? Explore the most common comparisons:

• flatworm vs. roundworm

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Example Sentences

See Examples For:

roundworm

Runners up in the competition included videos of a roundworm encountering a single-celled organism and microscopic jellyfish larvae suspended in droplets of water.

From BBC ● Sep. 18, 2026

The team, which included Nobel laureate Gary Ruvkun, PhD, studied a tiny roundworm species called C. elegans to understand how cells might function without frataxin.

From Science Daily ● Dec. 12, 2025

People can become infected if they ingest soil, dirt, water or other material contaminated with raccoon feces, which could contain roundworm eggs.

From Los Angeles Times ● Sep. 18, 2024

The intestinal effects of kombucha’s microbes were studied in Caenorhabditis elegans, a nematode roundworm.

From Salon ● Apr. 8, 2024

Filaria conjunctivæ, resembling Setaria equina very much in size and general appearance, is another roundworm which has been found in the eye of the horse.

From Special Report on Diseases of the Horse by Charles B. Michener

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