Definition that contains root nodule
- rhizobium the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen
- genus rhizobium the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen
- bacteroid a rodlike bacterium (especially any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants)