benzathine benzylpenicillin /ˌbɛn.zəˌθin ˌbɛn.zəlˌpɛn.ɪˈsɪl.ɪn/ noun1 •An aqueous suspension of a relatively insoluble salt of benzylpenicillin that is absorbed slowly following intramuscular injection to provide a low but persistent level of benzylpenicillin in the blood plasma.
