Butorphanol definitions

byo͝o-tôr'fə-nŏl
A synthetic opioid drug, C21 H29 NO2 , given by injection or nasal spray in its tartrate form to treat pain and to supplement anesthesia.
noun
8
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A synthetic opioid drug, C21 H29 NO2 , given by injection or nasal spray in its tartrate form to treat pain and to supplement anesthesia.
noun
5
0

Origin of butorphanol

but(yl) (m)orph(in)an structural basis of a group of opioids dextromethorphan –ol