eutrophicationnoun [ U ]
/ˌjuː.trə.fɪˈkeɪ.ʃən//ˌjuː.trə.fɪˈkeɪ.ʃən/specializedthe addition of nutrients to water in lakes and rivers, which encourages plant growth that can take oxygen from the water and kill fish and other animals:
Massive use of fertilizers contributes to the eutrophication of rivers and lakes.