toxicology

noun

tox·​i·​col·​o·​gy ˌtäk-si-ˈkä-lə-jē How to pronounce toxicology (audio)
: a science that deals with poisons and their effect and with the problems involved (such as clinical, industrial, or legal problems)
toxicologist noun

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

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Officials were previously awaiting toxicology results to determine whether the woman had been poisoned. Quinlan Bentley, Cincinnati Enquirer, 2 Oct. 2025 Police are awaiting information from vehicle data analysis and toxicology. Mara H. Gottfried, Twin Cities, 30 Sep. 2025 The plan also includes 49,000 square feet in a build-to-suite lease for a new Chattanooga office that would specialize in forensic biology, chemistry and toxicology. Kirsten Fiscus, Nashville Tennessean, 29 Sep. 2025 The cause of death has not been released, as investigators await the results of toxicology and other tests, KTLA reported. Martha Ross, Mercury News, 26 Sep. 2025 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

Browse Nearby Words

Cite this Entry

“Toxicology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/toxicology. Accessed 6 Oct. 2025.

Medical Definition

toxicology

noun
tox·​i·​col·​o·​gy -ˈkäl-ə-jē How to pronounce toxicology (audio)
plural toxicologies
: the scientific study of the adverse effects of chemical substances on the living organism

More from Merriam-Webster on toxicology

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!