'Symbiosis' is Greek for 'living together' — coined 1879 for close biological associations between species.
The close and often long-term interaction between two different biological species. A mutually beneficial relationship between different people or groups.
From modern scientific Latin 'symbiosis,' coined by the German botanist Heinrich Anton de Bary in 1879 in his foundational work on fungi and parasitism, from Greek 'symbiōsis' (a living together, companionship, life in common), from 'symbioun' (to live together), from 'syn-' (together, with) + 'bios' (life, manner of living). The PIE root of 'bios' is *gʷeyh₃- (to live) — the same root giving Latin 'vivere' (to live), Greek 'zōē' (life), and English 'quick' in its archaic sense of 'alive' (as in 'the quick and the dead'). De Bary deliberately chose a broad
Heinrich Anton de Bary, who coined 'symbiosis' in 1879, defined it as 'the living together of unlike organisms' — a definition that deliberately included parasitism, commensalism, and mutualism. Popular usage has narrowed the word to mean only mutualistic relationships (where both parties benefit), but biologists still use it in de Bary's broader sense. A tapeworm living in your intestine is technically in symbiosis with you, even though only one
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