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
Try to avoid options that contain acetaminophen, the active ingredient in Tylenol, as this ingredient may cause liver damage when taken in combination with alcohol.
—
Cristina Mutchler, Verywell Health, 10 Apr. 2025
Conflicting studies There is a conflicting body of research on the use of acetaminophen during pregnancy and the risk of adverse neurodevelopment.
—Shiv Sudhakar, FOXNews.com, 27 Mar. 2025
Pain can often be managed with over-the-counter medications like ibuprofen or acetaminophen.
—Daryl Austin, USA Today, 9 June 2025
Behavioral therapy for pain Many adults think nothing of taking medicines such as ibuprofen or acetaminophen for minor aches and pains, but there’s little evidence that pharmacologic treatments work best for children’s chronic pain.
—Natoshia R. Cunningham, The Conversation, 4 June 2025
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Cristina Mutchler, Verywell Health, 10 Apr. 2025
Conflicting studies There is a conflicting body of research on the use of acetaminophen during pregnancy and the risk of adverse neurodevelopment.
—Shiv Sudhakar, FOXNews.com, 27 Mar. 2025
Pain can often be managed with over-the-counter medications like ibuprofen or acetaminophen.
—Daryl Austin, USA Today, 9 June 2025
Behavioral therapy for pain Many adults think nothing of taking medicines such as ibuprofen or acetaminophen for minor aches and pains, but there’s little evidence that pharmacologic treatments work best for children’s chronic pain.
—Natoshia R. Cunningham, The Conversation, 4 June 2025
See All Example Sentences for acetaminophen
Cite this Entry
“Acetaminophen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acetaminophen. Accessed 1 Jul. 2025.
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
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