# rhizobium

> English word · Noun

## Definitions
1. Any of various bacteria, of the genus Rhizobium, that form nodules on the roots of legumes and fix nitrogen.
2. Any diazotrophic bacterium that can fix nitrogen and form root nodules in legumes.

## Etymology
From the genus name.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/rhizobium