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botulinum toxin
noun
: a neurotoxin formed by botulinum that causes botulism and that is injected in a purified form for therapeutic and cosmetic purposes (as to treat blepharospasm and reduce wrinkles)
Examples of botulinum toxin in a Sentence
Recent Examples on the Web
Botox is derived from botulinum toxin type A, a toxin that’s produced from the bacterium Clostridium botulinum.
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Caroline C. Boyle, USA TODAY, 9 Feb. 2025
With the Botox approach, small amounts of botulinum toxin are injected into the voice box muscles to stop the spasms.
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Melissa Rudy, Fox News, 29 Jan. 2025
Products like dips can be particularly risky for botulinum toxin contamination if they are not processed properly, as Clostridium botulinum thrives in low-acid, low-oxygen environments.
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Gordon G. Chang, Newsweek, 24 Jan. 2025
The botulinum toxin blocks the release of acetylcholine, a neurotransmitter responsible for muscle contractions, leading to muscle paralysis.
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Gordon G. Chang, Newsweek, 24 Jan. 2025
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Word History
First Known Use
1923, in the meaning defined above
Dictionary Entries Near botulinum toxin
Cite this Entry
“Botulinum toxin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/botulinum%20toxin. Accessed 18 Feb. 2025.
Medical Definition
botulinum toxin
noun
variants
also botulinus toxin
: a very powerful neurotoxin that causes botulism and is produced by the botulinum bacterium (Clostridium botulinum)
also
: botulinum toxin type a
Note: Botulinum toxin acts primarily on the parasympathetic nervous system.
More from Merriam-Webster on botulinum toxin
Britannica.com: Encyclopedia article about botulinum toxin
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