ScienceAugust 27, 2026

symbiosis

sim-bee-OH-sis

Definition

A biological relationship where two different organisms live in close physical association, often to the mutual benefit of both.

Etymology

Derived from the Greek word 'symbiosis,' meaning 'living together,' which combines 'syn-' (together) and 'bios' (life). It entered English in the 19th century to describe these types of biological partnerships.

In the news

The article uses the term to describe how mycorrhizal fungi rely on living plant roots for their survival, a connection so interdependent that it cannot be successfully replicated in a laboratory setting.

Mycology in a War Zone

Read the full article ↗

Earth Island Institute

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