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|Noun||1.||family Rhizobiaceae - a small family of rod-shaped bacteria|
bacteria family - a family of bacteria
genus Rhizobium, Rhizobium - the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen
Agrobacterium, genus Agrobacterium - small motile bacterial rods that can reduce nitrates and cause galls on plant stems