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Toxins Are Often Found in Nature
Long before chemists started creating poisons from scratch, humans were employing natural toxins for killing weeds and insects. For centuries South American tribes have used the toxin curare, extracted from a native vine, to tip their arrows. The garden flower called wolfsbane or monkshood is the source of aconite, an extremely potent toxin. The common flower known as jimsonweed contains the deadly poison scopolamine. And the castor-oil plant yields the almost unbelievably poisonous toxin called ricin. Today we hear health advisers of all kinds talk about ridding the body of toxins; but they're usually pretty vague about which ones they mean, and most of these "toxins" wouldn't be called that by biologists.
Examples of toxin in a Sentence
Dinah Voyles Pulver, USA Today, 15 Feb. 2026
Russian opposition figure and outspoken Kremlin critic Alexey Navalny, who died two years ago, was killed while in prison by a lethal toxin found in poison dart frogs in South America, five European countries have said in a statement Saturday.
—Catherine Nicholls, CNN Money, 14 Feb. 2026
Dart frogs in captivity do not produce this toxin, and it is not found naturally in Russia.
—Nandika Chatterjee, Time, 14 Feb. 2026
Curcumin's antioxidant properties may also protect the lungs from damage caused by long-term exposure to toxins.
—Lindsay Curtis, Health, 6 Feb. 2026
See All Example Sentences for toxin
Cite this Entry
“Toxin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/toxin. Accessed 19 Feb. 2026.
Copy CitationKids Definition
derived from Latin tox- "poisonous" and English -in "chemical compound"; tox- from toxicum "poison," from Greek toxikon "arrow poison," from toxon "bow, arrow" — related to intoxicate, toxic see Word History at intoxicate
