GENTAMICIN Meaning of GENTAMICIN in English [ ˌdʒɛntə'mʌɪsɪn ]■ noun a broad-spectrum antibiotic used chiefly for severe systemic infections.Origin1960s: from genta- (of unknown origin) + -micin (alt. of -mycin ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004