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

nitrogen cycle

noun
 
/ˈnaɪtrədʒən saɪkl/
 
/ˈnaɪtrədʒən saɪkl/
[countable, uncountable]
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  1. the processes by which nitrogen is passed from one part of the environment to another, for example when plants decay (= become destroyed by natural processes)Topics The environmentc2
See nitrogen cycle in the Oxford Advanced American Dictionary
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