hydromorphone

== English == === Alternative forms === dihydromorphinone, dimorphone === Etymology === From (di)hydromorph(ine) +‎ -one. === Noun === hydromorphone (uncountable) (pharmacology) A synthetic narcotic analgesic, (4,5 alpha-epoxy-3-hydroxy-17-methyl morphinan-6-one), similar to morphine and heroin. It is used for moderate to severe pain under the trade name Dilaudid.