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| rhi·zo·bi·um [ rī zṓbee əm ] (plural rhi·zo·bi·a [ rī zṓbee ə ]) |
noun |
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| Definition: |
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soil bacterium: a soil bacterium that forms nodules on the roots of legumes and takes up nitrogen from the atmosphere. Genus Rhizobium.
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| [Early 20th century. < modern Latin< Greek rhiza "root" + bios "life"] |
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