[ nal-er-feen, nal-awr-feen ]
/ ˈnæl ərˌfin, nælˈɔr fin /

noun Pharmacology.

a white, crystalline, water-soluble powder, C19H21NO3, used to nullify respiratory depression due to narcotics and for the diagnosis of addiction to narcotics.

Origin of nalorphine

1950–55; N-al(lyln)or(mor)phine; see allyl, nor-, morphine Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019