methacycline

noun
metha·​cy·​cline | \ ˌmeth-ə-ˈsī-ˌklēn \

Medical Definition of methacycline

: a semisynthetic tetracycline C22H22N2O8 with longer duration of action than most other tetracyclines and used in the treatment of gonorrhea especially in penicillin-sensitive subjects

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