Nitrifying-bacterium definition

Any of various chemolithoautotrophic bacteria that obtain energy either by oxidizing ammonium compounds into nitrites or by oxidizing nitrites into nitrates and that play an important role in the nitrogen cycle.

Any of various chemolithoautotrophic bacteria that obtain energy either by oxidizing ammonium compounds into nitrites or by oxidizing nitrites into nitrates and that play an important role in the nitrogen cycle.