nitrogen cycle is a noun meaning "the circulation of nitrogen; nitrates from the soil are absorbed by plants which are eaten by animals that die and decay returning the nitrogen back to the soil". It carries one recorded sense.
the circulation of nitrogen; nitrates from the soil are absorbed by plants which are eaten by animals that die and decay returning the nitrogen back to the soil
Definitions, synonyms and semantic relations for nitrogen cycle come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.