Definition of nitrogen cycle in US English:

nitrogen cycle


  • The series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition.

    • ‘The nitrogen cycle and carbon cycle are the two most well known examples of these natural cycles.’
    • ‘The atmospheric nitrogen cycle is highly complex and there is a wide range of factors that can affect the nitrate level in polar ice.’
    • ‘And I'm not just talking about climatic controls, but controls over the nitrogen cycle, the spread of diseases in humans and animals, and the effects of pollution on living organisms.’
    • ‘This symbiosis, mediated by chemical communication between the plant and the bacteria, is a vital component of the global nitrogen cycle.’
    • ‘The ecological consequences of failing to recognize novel targets of chemical pollutants and EDCs may be a net loss of biological diversity and a further imbalance of the global nitrogen cycle.’


nitrogen cycle

/ˈnaɪtrədʒən ˈsaɪkəl/