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(Pharmacology) an anti-narcotic drug used esp to counteract the effects of morphine poisoning
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈnæl ərˌfin, nælˈɔr fin)

a narcotic antagonist, C19H21NO3, chemically related to morphine, used to counteract overdose and to diagnose addiction.
[1950–55; N-al(lyln)or(mor)phine]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.nalorphine - a narcotic antagonist (trade name Nalline) that counteracts the effects of narcotics (especially the effects of poisoning by morphine)
narcotic antagonist - an antagonist used to counteract the effects of narcotics (especially to counteract the depression of respiration)
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