neurotoxin

noun

neu·​ro·​tox·​in ˌnu̇r-ō-ˈtäk-sən How to pronounce neurotoxin (audio)
ˌnyu̇r-
: a poisonous substance (such as tetrodotoxin or saxitoxin) that acts on the nervous system and disrupts the normal function of nerve cells

Did you know?

The nervous system is almost all-powerful in the body: all five senses depend on it, as do breathing, digestion, and the heart. So it's an obvious target for poisons, and neurotoxins have developed as weapons in many animals, including snakes, bees, and spiders. Some wasps use a neurotoxin to paralyze their prey so that it can be stored alive to be eaten later. Snake venom is often neurotoxic (as in cobras and coral snakes, for example), though it may instead be hemotoxic (as in rattlesnakes and coppermouths), operating on the circulatory system. Artificial neurotoxins, called nerve agents, have been developed by scientists as means of chemical warfare; luckily, few have ever been used.

Examples of neurotoxin in a Sentence

Recent Examples on the Web
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Botox is a neurotoxin made from Clostridium botulinum bacteria. Ayesha Gulzar, Verywell Health, 10 Jan. 2025 Scientists examined samples of ice in Greenland, which give molecular clues of past environmental conditions, and found strong concentrations of the heavy metal, which is a neurotoxin associated with learning disabilities, reproductive problems and mental health issues, among other effects. Elizabeth Robinson, NBC News, 7 Jan. 2025 According to the Environmental Protection Agency (EPA), exposure to lead, which is a neurotoxin, can cause irreversible and life-long health effects in children. Kevin Lynn, Newsweek, 6 Jan. 2025 Advertisement Climate & Environment Outbreak of neurotoxin killing unprecedented number of sea lions along California coast Aug. 11, 2024 Surveillance of the virus is also complicated by the fact that H5N1 infected cows show only subtle signs of infection — lethargy, decreased milk production, etc. Susanne Rust, Los Angeles Times, 4 Sep. 2024 See all Example Sentences for neurotoxin 

Word History

Etymology

borrowed from French névrotoxine, from névro- neuro- + toxine toxin

First Known Use

1902, in the meaning defined above

Time Traveler
The first known use of neurotoxin was in 1902

Dictionary Entries Near neurotoxin

Cite this Entry

“Neurotoxin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neurotoxin. Accessed 20 Jan. 2025.

Medical Definition

neurotoxin

noun
neu·​ro·​tox·​in -ˈtäk-sən How to pronounce neurotoxin (audio)
: a poisonous substance (such as tetrodotoxin or saxitoxin) that acts on the nervous system and disrupts the normal function of nerve cells

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