Source : WordNet®

Fentanyl
     n : trade names of a narcotic analgesic that can be inhaled and
         that acts on the central nervous system and may become
         addictive; used as a veterinary anesthetic and with other
         drugs before, during, and after surgery; also used as a
         nonlethal gas to incapacitate people in hostage
         situations; also abused as a recreational drug [syn: {Sublimaze}]