nitrogen_cycle
1. [ noun ] (biology) 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
Related terms: organic_process
Similar spelling:   nitrogenize
  nitrogenise
  nitrogenase
  nitrogen_oxide
  nitrogen_dioxide
  nitrogen_balance
  nitrogenous
  nitrogen_mustard
  nitrogen_narcosis
  nitrogen_fixation
  nitroglycerin