lungworm

noun

lung·​worm ˈləŋ-ˌwərm How to pronounce lungworm (audio)
: any of various nematodes that infest the lungs and air passages of mammals

Examples of lungworm in a Sentence

Recent Examples on the Web
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Frogs, lizards and crustaceans have also been known to transfer lungworm when ingested by animals. Caleb Lunetta, San Diego Union-Tribune, 7 Mar. 2026 Doctors are urged to consider lungworm when diagnosing nervous system disorders, as early treatment with corticosteroids and antiparasitic drugs can be effective. Susanne Rust follow, Los Angeles Times, 6 Mar. 2026 Some of the luckiest rat lungworm victims don't need treatment and make full recoveries after the larvae die off on their own. Ars Technica, 11 Mar. 2025 The lungworm cannot pass from person to person, and fish do not spread it. Will Sullivan, Smithsonian Magazine, 29 Sep. 2023 See All Example Sentences for lungworm

Word History

First Known Use

1882, in the meaning defined above

Time Traveler
The first known use of lungworm was in 1882

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Cite this Entry

“Lungworm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lungworm. Accessed 5 Apr. 2026.

Medical Definition

lungworm

noun
lung·​worm -ˌwərm How to pronounce lungworm (audio)
: any of various nematodes of the order Strongylida and especially of the family Metastrongylidae that infest the lungs and air passages of mammals: as
a
: a lungworm of the genus Metastrongylus (M. elongatus synonym M. apri) that infests swine and causes bronchitis
b
: a nematode of the genus Dictyocaulus

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