bacteria bed bacteria • Bacteriaceae · · · Info · Definitions · Characters · · bacteria bed · · Text Common · · Latin · · Scripts 12 · · Length 5 · · Syllables Definitions · · · (noun) layer of sand or gravel used to expose sewage effluent to air and the action of microorganisms. Synonyms: bacteria bed. · · 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 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 r latin small letter r U+0072 t latin small letter t U+0074