penicillin f penicillinase-resistant antibiotic • penicillin g · · · Info · Definitions · Characters · · penicillin f · · Text Common · · Latin · · Scripts 12 · · Length 5 · · Syllables Definitions · · · (noun) the first form of penicillin that was isolated in Great Britain. Synonyms: penicillin F. · · Noun Definition 1 Characters · · space U+0020 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E p latin small letter p U+0070