Definition of nitrogen cycle noun from the Oxford Advanced Learner's Dictionary


nitrogen cycle

BrE BrE//ˈnaɪtrədʒən saɪkl//
; NAmE NAmE//ˈnaɪtrədʒən saɪkl//
[countable, uncountable] Waste and pollution
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the processes by which nitrogen is passed from one part of the environment to another, for example when plants decay See related entries: Waste and pollution
See the Oxford Advanced American Dictionary entry: nitrogen cycle