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levorphanol

[ luh-vawr-fuh-nawl, -nol ]
/ ləˈvɔr fəˌnɔl, -ˌnɒl /
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noun Pharmacology.
a potent synthetic narcotic analgesic, C21H29NO7, as the tartrate, used in the treatment of moderate to severe pain.
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Origin of levorphanol

lev- + (methylm)orph(in)an a chemical component + -ol1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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