nitrobacterium

Definitions of nitrobacterium
  1. noun
    any of the bacteria in the soil that take part in the nitrogen cycle; they oxidize ammonium compounds into nitrites or oxidize nitrites into nitrates
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    types:
    nitrate bacterium, nitric bacterium
    any of the nitrobacteria that oxidize nitrites into nitrates
    nitrite bacterium, nitrous bacterium
    any of the nitrobacteria that oxidize ammonia into nitrites
    type of:
    bacteria, bacterium
    (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants
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