gentamicin gent • genteel · · · Info · Definitions · Synonyms · Characters · · gentamicin · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) an antibiotic (trade name Garamycin) that is derived from an actinomycete; used in treating infections of the urinary tract. Synonyms: Garamycin. · · Noun Definition 1 Synonyms · · · garamycin · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E t latin small letter t U+0074