n :  a strongly physiologically addictive narcotic C₂₁H₂₃NO₅ that is made by acetylation of but is more potent than morphine and that is prohibited for medical use in the U.S. but is used illicitly for its euphoric effects - called also acetomorphine , diacetylmorphine , diamorphine  .
 
 
 
Similar sounding terms:  her·nia  horn  horny 
 
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