fentanyl

noun

fen·​ta·​nyl ˈfen-tə-ˌnil 

nonstandard -ˌnȯl

: a synthetic opioid narcotic analgesic C₂₂H₂₈N₂O with pharmacological action similar to morphine that is administered transdermally as a skin patch and in the form of its citrate C₂₂H₂₈N₂O·C₆H₈O₇ is administered orally or parenterally (as by intravenous or epidural injection)

Examples of fentanyl in a Sentence

Recent Examples on the Web

Jett died from an acute overdose of fentanyl and the manner of death was homicide, according to a toxicology report cited by Stephan. — Summer Lin, Los Angeles Times, 22 Oct. 2026

San Francisco police said cychlorphine, estimated to be 10 times estimated more powerful than fentanyl, can be found in counterfeit pills designed to look like Xanax, Adderall and Oxycontin. — Carlos E. Castañeda, CBS News, 21 Oct. 2026

Continue reading … -- IN OTHER NEWS HIGH POTENCY — ‘Super-drug’ 10 times stronger than fentanyl linked to deaths across multiple states. — FOXNews.com, 20 Oct. 2026

But knowing exactly how much fentanyl is present in a sample would be extremely helpful both for drug users and the healthcare workers treating them. — Prabhat Ranjan Mishra, Interesting Engineering, 17 Oct. 2026

Word History

Etymology

probably alteration of phenethyl, a monovalent radical derived from ethylbenzine, from phen- + ethyl

First Known Use

1964, in the meaning defined above

Rhymes for fentanyl

• bunnell
• funnel
• tunnel
• multifunctional

Medical Definition

fentanyl

noun

fen·​ta·​nyl ˈfent-ᵊn-ˌil 

: a synthetic opioid narcotic analgesic C₂₂H₂₈N₂O with pharmacological action similar to morphine that is administered transdermally as a skin patch and in the form of its citrate C₂₂H₂₈N₂O·C₆H₈O₇ is administered orally or parenterally

Note: Fentanyl is marketed under the trademark Actiq.