Rhizobium rhizinous • rhizocarp · · · Info · Definitions · Characters · · Rhizobium · · Text Latin · · Script 9 · · Length Definitions · · · (noun) the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen. Synonyms: genus Rhizobium. · · Noun Definition 1 Characters · · R latin capital letter r U+0052 b latin small letter b U+0062 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D o latin small letter o U+006F u latin small letter u U+0075 z latin small letter z U+007A