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
Seen and Heard
What made you want to look up hydromorphone? Please tell us where you read or heard it (including the quote, if possible).