penicillin G benzathine
noun
penicillin G ben·za·thine
| \ -ˈben-zə-ˌthēn, -thən
\
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Medical Definition of penicillin G benzathine
: an aqueous suspension of a relatively insoluble salt of penicillin G that is absorbed slowly following intramuscular injection to provide a low but persistent level of penicillin G in the blood plasma
— called also benzathine penicillin G