biotoxin

noun

bio·​tox·​in ˈbī-ō-ˌtäk-sən How to pronounce biotoxin (audio)
: a toxic substance of biological origin

Examples of biotoxin in a Sentence

Recent Examples on the Web
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As impressive as the hue may seem, however, the biotoxins produced by the algae is harmful to marine life and fisheries. Pueng Vongs, Mercury News, 18 Dec. 2025 The emergence of biotoxins in mussels is unpredictable and their concentrations can rapidly increase, according to state public health officials. Karen Garcia, Los Angeles Times, 10 May 2025 Reopening an area closed for biotoxins requires two consecutive tests that show toxin levels are below a certain threshold, according to the agency. CBS News, 10 June 2024 Authorities are also studying whether a biotoxin or virus might be causing the die-off. Diana Durán, Washington Post, 4 Oct. 2023 The Oregon Department of Fish and Wildlife provides information online on clam, crab, and mussel biotoxin closures in the state. oregonlive, 7 Aug. 2023

Word History

First Known Use

1898, in the meaning defined above

Time Traveler
The first known use of biotoxin was in 1898

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Cite this Entry

“Biotoxin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biotoxin. Accessed 5 Jul. 2026.

Medical Definition

biotoxin

noun
bio·​tox·​in ˈbī-ō-ˌtäk-sən How to pronounce biotoxin (audio)
: a toxic substance of biological origin

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