pathogen

noun

path·​o·​gen ˈpa-thə-jən How to pronounce pathogen (audio)
: a specific causative agent (such as a bacterium or virus) of disease

Examples of pathogen in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The pathogen is a common cause of food poisoning, which causes symptoms like nausea, vomiting and diarrhea that typically last for about 24 hours, per the National Library of Medicine. Toria Sheffield, People.com, 16 Feb. 2025 This process seals the wound from pathogens that can damage the inner vascular system. Markis Hill, Kansas City Star, 14 Feb. 2025 All other animals and plants may also be susceptible to infection from mirror pathogens. Kate Adamala, The Conversation, 11 Feb. 2025 This acidity also provides a comfy home for beneficial microbes while repelling pathogens. Matt Fuchs, TIME, 6 Feb. 2025 See All Example Sentences for pathogen

Word History

Etymology

patho- + -gen, after pathogenic, pathogenesis

First Known Use

1880, in the meaning defined above

Time Traveler
The first known use of pathogen was in 1880

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Cite this Entry

“Pathogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pathogen. Accessed 3 Mar. 2025.

Kids Definition

pathogen

noun
patho·​gen
ˈpath-ə-jən
: a germ (as a bacterium or virus) that causes disease

Medical Definition

pathogen

noun
patho·​gen ˈpath-ə-jən How to pronounce pathogen (audio)
: a specific causative agent (as a bacterium or virus) of disease

More from Merriam-Webster on pathogen

Last Updated: - Updated example sentences
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