naloxone nalorphine • naloxones · · · Info · Definitions · Synonyms · Characters · · naloxone · · Text Latin · · Script 8 · · Length 3 · · Syllables Definitions · · · (noun) a potent narcotic antagonist (trade name Narcan) especially effective with morphine. Synonyms: Narcan. · · Noun Definition 1 Synonyms · · · narcan · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F x latin small letter x U+0078