bacillus bacilluria • Bacis · · · Info · Definitions · Synonyms · Characters · · bacillus · · Text Latin · · Script 8 · · Length Definitions · · · (noun) aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil. Synonyms: B. · · Noun Definition 1 Synonyms · · · b · · Synonym 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 i latin small letter i U+0069 l latin small letter l U+006C s latin small letter s U+0073 u latin small letter u U+0075