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nalorphine

[nal-er-feen, nal-awr-feen]
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noun Pharmacology.
  1. a white, crystalline, water-soluble powder, C19H21NO3, used to nullify respiratory depression due to narcotics and for the diagnosis of addiction to narcotics.
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Origin of nalorphine

1950–55; N-al(lyln)or(mor)phine; see allyl, nor-, morphine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018