purple bacteria purple avens • purple beard grass · · · Info · Definitions · Characters · · purple bacteria · · Text Common · · Latin · · Scripts 15 · · Length 6 · · Syllables Definitions · · · (noun) free-living Gram-negative pink to purplish-brown bacteria containing bacteriochlorophyll. Synonyms: purple bacteria. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075