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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

The broader goal is to determine whether acetaminophen use during the first year of life is connected to health conditions that cannot be diagnosed reliably until children are older.

From Science Daily ● Aug. 6, 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

Some previous studies have indicated risks of acetaminophen to fetal development, but others have found no link, the Journal has reported.

From The Wall Street Journal ● Mar. 10, 2026

Could his trouble pronouncing acetaminophen be a phonemic paraphasic error?

From Slate ● Jan. 26, 2026

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