Definition of fentanyl in English:

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Pronunciation: /ˈfɛntənʌɪl/
Pronunciation: /ˈfɛntənɪl/


[mass noun] Medicine
A synthetic opiate drug which is a powerful painkiller and tranquillizer.
Example sentences
  • Opiates, including morphine and fentanyl, are powerful painkillers and anesthetics, but they also can slow a person's breathing to a dangerous rate.
  • Described as being 30 to 100 times more powerful than morphine, fentanyl is a synthetic opioid that is also used to provide relief to persons suffering with chronic pain.
  • As a result, pharmaceutical companies have produced alternative opioids such as oxycodone, hydromorphone, fentanyl, methadone, and tramadol.


1960s: apparently from fen- (representing phen-) + -t- + an- + -yl.

For editors and proofreaders

Line breaks: fen|tanyl

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