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  1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                

    
                
                  
    reactive nitrogen species /ɹɪˈaktɪv nˈaɪtɹədʒən spˈiːsiːz/ (RNS /ˌɑːɹˌɛnˈɛs/)
reaktive Stickstoffspezies <pl> [biochem.]