spirillum spirillotropism • spiring · · · Info · Definitions · Synonyms · Characters · · spirillum · · Text Latin · · Script 9 · · Length Definitions · · · (noun) spirally twisted elongate rodlike bacteria usually living in stagnant water. · · Noun Definition 1 (noun) any flagellated aerobic bacteria having a spirally twisted rodlike form. Synonyms: spirilla. · · Noun Definition 2 Synonyms · · · spirilla · · Synonym 1 Characters · · i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075