Definition of trophic level noun from the Oxford Advanced Learner's Dictionary

 

trophic level

 noun
noun
BrE
 
; NAmE
 
(specialist)
 
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each of several levels in an ecosystem (= all the plants and animals in a particular area and their relationship with their surroundings). Each level consists of living creatures that share the same function in the food chain and get their food from the same source.
See the Oxford Advanced American Dictionary entry: trophic level