Definition of commensalism noun from the Oxford Advanced Learner's Dictionary

 

commensalism

 noun
noun
BrE BrE//kəˈmenslɪzəm//
 
; NAmE NAmE//kəˈmenslɪzəm//
 
[uncountable](biology)
 
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the fact of an animal or plant living on another animal or plant and getting food from the situation, but doing no harm