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Definition of: symbiosis
Our photo definition of symbiosis 
(sim′bī·ō′sis, -bē-) noun Biol.
The consorting together or partnership of dissimilar organisms, as of the algae and fungi in lichens. The term ordinarily connotes an association which is mutually advantageous. Compare CONSORTISM. [<NL <Gk. symbiōsis a living together, companionship <symbioein live together <symbios a companion, living together <syn- together + bios life]
—sym′bi·ot′ic (-ot′ik) or ·i·cal adjective
—sym′bi·ot′i·cal·ly adverb
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