Submitted by György Chityil ... on Sat, 01/20/2018 - 00:52 Hierarchy: NounDescription: {{biology}} Any of various bacteria, of the genus ''Rhizobium'', that form nodules on the roots of legumes and fix nitrogenNgram Text: rhizobiumSource: WiktionaryIssue: 0Wiktionary tag: biologyNgram Count: 1