Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Modern Latin
Origin: Greek, from symbios 'living together'

symbiosis

 noun
     
Related topics: Biology
sym‧bi‧o‧sis [singular, uncountable]
1 formal a relationship between people or organizations that depend on each other equally
2 technicalHB the relationship between different living things that depend on each other
Definition from the Longman Dictionary of Contemporary English
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