acetaminophen
noun
acet·amin·o·phen
ə-ˌsē-tə-ˈmi-nə-fən 
ˌa-sə-tə-
: a crystalline compound C8H9NO2 that is a hydroxy derivative of acetanilide and is used in chemical synthesis and in medicine to relieve pain and fever
Examples of acetaminophen in a Sentence
Recent Examples on the Web
In October, the DEA Los Angeles Field Division found 628,000 pills containing carfentanil, while in September, officials seized more than 50,000 counterfeit M30 pills from a person at a gas station in Washington state that turned out to be a mixture of carfentanil and acetaminophen.
—
ABC News, 17 Apr. 2026
Neighbors near Miller Park in Fair Oaks are on alert after hot dogs stuffed with what’s believed to be acetaminophen were discovered, authorities said.
—Corey Schmidt, Sacbee.com, 16 Apr. 2026
Pat Broderick and Cathy Anderson, who both had single knees done recently at Kaiser Permanente, each took only a single opioid pill before using only acetaminophen.
—Nicole Sours Larson, San Diego Union-Tribune, 14 Apr. 2026
For example, regular acetaminophen can take about one hour to work, but fast-acting or dissolving acetaminophen works in about 15 to 20 minutes.
—Emmanuella Ogbonna, Health, 8 Apr. 2026
See All Example Sentences for acetaminophen
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ABC News, 17 Apr. 2026
Neighbors near Miller Park in Fair Oaks are on alert after hot dogs stuffed with what’s believed to be acetaminophen were discovered, authorities said.
—Corey Schmidt, Sacbee.com, 16 Apr. 2026
Pat Broderick and Cathy Anderson, who both had single knees done recently at Kaiser Permanente, each took only a single opioid pill before using only acetaminophen.
—Nicole Sours Larson, San Diego Union-Tribune, 14 Apr. 2026
For example, regular acetaminophen can take about one hour to work, but fast-acting or dissolving acetaminophen works in about 15 to 20 minutes.
—Emmanuella Ogbonna, Health, 8 Apr. 2026
See All Example Sentences for acetaminophen
Cite this Entry
“Acetaminophen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acetaminophen. Accessed 25 Apr. 2026.
Copy CitationKids Definition
acetaminophen
noun
acet·amin·o·phen
ə-ˌsēt-ə-ˈmin-ə-fən
: a crystalline compound used in medicine to relieve pain and fever
Medical Definition
acetaminophen
noun
acet·amin·o·phen
ə-ˌsēt-ə-ˈmin-ə-fən
ˌas-ət-
ˌas-ət-
: a crystalline compound C8H9NO2 that is a hydroxy derivative of acetanilide and is used in chemical synthesis and in medicine instead of aspirin to relieve pain and fever
called also paracetamol
see liquiprin, panadol, tylenolLove words? Need even more definitions?
Merriam-Webster unabridged
