hydromorphone

noun
hy·dro·mor·phone | \-ˈmȯr-ˌfōn \

Medical Definition of hydromorphone 

: a ketone C17H19NO3 derived from morphine that is about five times as active biologically as morphine and is administered in the form of its hydrochloride C17H19NO3·HCl as an analgesic

called also dihydromorphinone

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