symbiosis

Noun
  1. The relation between two different species of organisms that are interdependent;
    Each gains benefits from the other (synset 113864821)
    is a type of: interdependence, interdependency, mutuality - a reciprocal relation between interdependent entities (objects or individuals or groups)
    subtypes: trophobiosis - a symbiotic relation in which one organism protects the other in return for some kind of food product
    same as: mutualism

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