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Definition of ecology noun from the Oxford Advanced American Dictionary

 

ecology

 noun
noun
NAmE//ɪˈkɑlədʒi//
 
[uncountable]
 
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the relation of plants and living creatures to each other and to their environment; the study of this plant/animal/human ecology the ecology movement Oil pollution could damage the fragile ecology of the coral reefs.
See the Oxford Advanced Learner's Dictionary entry: ecology