de·​worm (ˌ)dē-ˈwərm How to pronounce deworm (audio)
dewormed; deworming; deworms

transitive verb

: to rid of worms : worm sense 4
deworm a dog
dewormer noun

Examples of deworm in a Sentence

Recent Examples on the Web How to deworm the four horsemen. Joseph Goodman |, al, 2 Sep. 2021 Ivermectin was originally developed to deworm livestock animals before doctors began using it against parasitic diseases among humans. Jake Zuckerman and Terry Demio, USA TODAY, 30 Aug. 2021 Based on her paper's results, local wildlife managers have decided to deworm camels in the study area to protect animals such as giraffes, whose numbers are declining. Sasha Warren, Scientific American, 18 Aug. 2022 Ivermectin is used to treat parasites such as worms and lice in humans and it is also used by veterinarians to deworm large animals. Alaa Elassar, CNN, 24 Dec. 2021 Bowden promoted ivermectin, a drug generally used to deworm animals, as a treatment for Covid several times on her Twitter account, despite public health officials warning against it. Marlene Lenthang, NBC News, 15 Nov. 2021 Ivermectin, a drug generally used to deworm animals, has become a popular but unproven medication to treat Covid among some who oppose vaccinations. NBC News, 5 Nov. 2021 Many have been ingesting the livestock version of the medication used to deworm large animals like horses, causing calls to poison control centers in Texas and nationwide to soar. Timothy Fanning, San Antonio Express-News, 16 Sep. 2021 Some versions of ivermectin are also used to deworm livestock. Jordan Moreau, Variety, 13 Sep. 2021 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'deworm.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1926, in the meaning defined above

Time Traveler
The first known use of deworm was in 1926

Dictionary Entries Near deworm

Cite this Entry

“Deworm.” Dictionary, Merriam-Webster, Accessed 2 Dec. 2023.

Medical Definition


transitive verb
de·​worm (ˈ)dē-ˈwərm How to pronounce deworm (audio)
: to rid (as a dog) of worms : worm
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