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toxicology

American  
[tok-si-kol-uh-jee] / ˌtɒk sɪˈkɒl ə dʒi /

noun

  1. the science dealing with the effects, antidotes, detection, etc., of poisons.


toxicology British  
/ ˌtɒksɪkəˈlɒdʒɪkəl, ˌtɒksɪˈkɒlədʒɪ /

noun

  1. the branch of science concerned with poisons, their nature, effects, and antidotes

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

toxicology Scientific  
/ tŏk′sĭ-kŏlə-jē /
  1. The scientific study of poisons, of their effects and detection, and of the treatment of poisoning.


Other Word Forms

Etymology

Origin of toxicology

First recorded in 1790–1800; toxico- + -logy

Explanation

Toxicology is the field that studies poisons, especially how poisons work and how to treat them. If you’re writing a true crime story, you should study toxicology to know what happens when the villain poisons the victim’s tea. Mwah ha ha. Have you ever seen a label that said "toxic"? That means that substance will harm you. Toxicology — which is a branch of pharmacology — has to do with toxic substances (poisons). It comes from the Greek word for “arrow poison.” Not all poisons come at the end of an arrow, though. If a toxicology report is done on a dead person, it will reveal if they had any dangerous substances in them, such as illegal drugs or drain cleaner.

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

A post-mortem examination was carried out on 13 April at Basildon Hospital, but pathologists were waiting for toxicology results and a report from Thailand, the inquest heard.

From BBC Apr. 21, 2026

Symptoms, which toxicology experts associate with sulfur-dioxide exposure, were worst among people living closest to the processing plant, the report from the Environmental Investigation Agency said.

From The Wall Street Journal Mar. 9, 2026

Autopsies were performed Thursday and toxicology results are expected in a few weeks, said Tony Cipolla, public information officer for the Sheriff’s Department.

From Los Angeles Times Feb. 13, 2026

Heard says interest in using fomepizole for acetaminophen overdose dates back to the 1990s, when he was training in medical toxicology.

From Science Daily Jan. 18, 2026

Baird conceded, though, that because of the toxicology issues, this one may be tougher than the one with the driver and the bad brakes.

From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel

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