toxicology

noun

: a science that deals with poisons and their effect and with the problems involved (such as clinical, industrial, or legal problems)

Did you know?

Even though most of us are aware of toxicology primarily from crime shows on TV, toxicologists actually do most of their work in other fields. Many are employed by drug companies, others by chemical companies. Many work for the government, making sure the public is being kept safe from environmental poisons in the water, soil, and air, as well as unhealthy substances in our food and drugs. These issues often have to do with quantity; questions about how much of some substance should be considered dangerous, whether in the air or in a soft drink, may be left to toxicologists. But occasionally a toxicology task may be more exciting: for instance, discovering that what looked like an ordinary heart attack was actually brought on by a hypodermic injection of a paralyzing muscle relaxant.

Examples of toxicology in a Sentence

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The hotline is open 24/7/365 and specializes in toxicology, and its staff will advise whether monitoring is sufficient or if a dog needs to go to a veterinary ER. — Adam Harrington, CBS News, 28 Oct. 2026 The Lanitis family was warned that a toxicology report might be slow in arriving—the substances in Lanitis’s body were not the sort that the canton’s forensic scientists typically evaluated. — D. T. Max, New Yorker, 26 Oct. 2026 In 2003, Volkheimer’s work was cited in a California asbestos and drinking water report, and began to be referenced in marine biology and environmental toxicology papers. — Susanne Rust follow, Los Angeles Times, 26 Oct. 2026 Wichita police announced Sunday that the 34-year-old woman was released pending toxicology results and a mechanical examination of her Chevrolet pickup. — Stepheny Price, FOXNews.com, 18 Oct. 2026 See All Example Sentences for toxicology

Word History

First Known Use

1799, in the meaning defined above

Time Traveler
The first known use of toxicology was in 1799

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Cite this Entry

“Toxicology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/toxicology. Accessed 31 Oct. 2026.

Medical Definition

toxicology

noun
plural toxicologies
: the scientific study of the adverse effects of chemical substances on the living organism

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