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acetaminophen

American

[uh-see-tuh-min-uh-fuhn] / əˌsi təˈmɪn ə fən /

noun

Pharmacology.

a crystalline substance, C 8 H 9 NO 2 , used as a headache and pain reliever and to reduce fever.

acetaminophen Scientific

/ ə-sē′tə-mĭn′ə-fən,ăs′ə- /

A crystalline compound used in medicine to relieve pain and reduce fever. Chemical formula: C ₈ H ₉ NO ₂.

Etymology

Origin of acetaminophen

First recorded in 1955–60; acet- + amino- + phen(ol)

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:

acetaminophen

Overall, the results showed no association between acetaminophen or ibuprofen and eczema or bronchiolitis.

From Science Daily ● Aug. 6, 2026

Dalziel notes that acetaminophen and ibuprofen are among the medicines most often prescribed or purchased over the counter for babies around the world.

From Science Daily ● Aug. 6, 2026

Plaintiff lawyer Ashley Keller said, “The Court of Appeals agreed that our experts’ analyses of the voluminous research linking prenatal acetaminophen exposure to neurodevelopmental disorders is reliable.

From The Wall Street Journal ● Jul. 13, 2026

"And we are certainly not deciding the approach that policymakers concerned with protecting public health should take to regulating the use of acetaminophen."

From Barron's ● Jul. 13, 2026

Meanwhile professional societies representing obstetricians continue to say pregnant women should use acetaminophen to treat pain and fever.

From The Wall Street Journal ● Mar. 10, 2026

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023