Share this entry

fentanyl Line breaks: fen|tanyl
Pronunciation: /ˈfɛntənʌɪl/

Definition of fentanyl in English:


[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.

Definition of fentanyl in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day luxe
Pronunciation: ləks
expensive and of high quality; luxurious