English noun: nitrobacterium | |||
1. | nitrobacterium (animal) 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 | ||
Broader (hypernym) | bacteria, bacterium | ||
Narrower (hyponym) | nitrate bacterium, nitric bacterium, nitrite bacterium, nitrous bacterium | ||