pin·​worm | \ ˈpin-ˌwərm How to pronounce pinworm (audio) \

Definition of pinworm

1 : any of numerous small nematode worms (family Oxyuridae) that infest the intestines and especially the cecum of various vertebrates especially : a worm (Enterobius vermicularis) parasitic in humans
2 : any of several rather slender insect larvae that burrow in plant tissue

Examples of pinworm in a Sentence

Recent Examples on the Web And then there's the most common worm infection in the U.S.: pinworm. Casey Gueren, SELF, 19 Aug. 2021 Linda tries to take her family to the symphony on free-admission night, but her efforts are thwarted by a pinworm epidemic. Washington Post, 3 Oct. 2020 The presence of specific parasites can also indicate whether a sample is human or canine, such as eggs from pinworms (Enterobius vermicularis), which are typically only present in human feces. Jennifer Ouellette, Ars Technica, 19 Apr. 2020 Further testing showed that all four had anti-cancer effects, but one in particular, pyrvinium pamoate, which is approved for the treatment of pinworms, significantly reduced the growth of liver-cancer tumors in laboratory mice. Aimee Swartz, Washington Post, 13 May 2018 The lab mice would pick up whatever the pet-shop mouse was carrying—everything from fur mites and pinworms to mouse hepatitis—and perhaps become immunologically more like the pet-shop mouse. Cassandra Willyard, Scientific American, 9 Apr. 2018 Pests monitored: Pheromone lures are available for diamondback moths and moths that produce armyworms, cabbage loopers, corn earworms, European corn borers, tomato pinworms, and cutworms. The Editors Of Organic Life, Good Housekeeping, 18 Dec. 2017 Luckily, pinworm infections don't usually lead to any complications. Samantha Lauriello,, 3 July 2019 When the pinworms returned a while later, the doctor prescribed albendazole, a prescription treatment that has been around for decades. New York Times, 5 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pinworm.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of pinworm

1846, in the meaning defined at sense 1

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The first known use of pinworm was in 1846

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Dictionary Entries Near pinworm

pin wire


pin wrench

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Last Updated

1 Sep 2021

Cite this Entry

“Pinworm.” Dictionary, Merriam-Webster, Accessed 19 Sep. 2021.

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More Definitions for pinworm


pin·​worm | \ ˈpin-ˌwərm How to pronounce pinworm (audio) \

Medical Definition of pinworm

: any of numerous small nematode worms of the family Oxyuridae that have the tail of the female prolonged into a sharp point and infest the intestines and especially the cecum of various vertebrates especially : a worm of the genus Enterobius (E. vermicularis) that is parasitic in humans

More from Merriam-Webster on pinworm

Nglish: Translation of pinworm for Spanish Speakers Encyclopedia article about pinworm


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