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Meaning of oxymorphone

ox•y•mor•phone

Pronunciation: (ok"si-môr'fōn), [key]
— n. Pharm.
  1. a potent semisynthetic morphine-derived narcotic analgesic, CHNO, used as a substitute for morphine.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.