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butorphanol

[byoo-tawr-fuh-nawl, -nol]
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noun Pharmacology.
  1. a narcotic analgesic, C21H29NO2, administered by injection to treat moderate to severe pain.
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Origin of butorphanol

as contraction of the chemical name 17-(cyclobutylmethyl)morphinan-3,14-diol
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018