butorphanol

== English == === Etymology === From (cyclo)but(yl) +‎ -orphan (“opioid receptor antagonist/agonist”) +‎ -ol. === Pronunciation === (General American) IPA(key): /bjuˈtɔɹ.fəˌnɔl/ === Noun === butorphanol (uncountable) (pharmacology) A synthetic analgesic and antitussive opioid drug (trademark Stadol) administered in the form of its tartrate C21H29NO2·C4H6O6 as a nasal spray or by injection especially for the relief of pain. ==== Derived terms ==== butorphanol tartrate === References === “butorphanol”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.