Definition of "fentanyl"
fentanyl
/ˈfɛn.tə.nɪl/
noun
countable and uncountable, plural fentanyls
(pharmacology) 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); N-phenyl-N-[1-(2-phenylethyl)piperidin-4-yl]propanamide.