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symbiosis
(sim″bi-o´sis)
pl. symbio´ses
in parasitology, the biologic association of two individuals or populations of different species; it is classified as mutualism, commensalism, parasitism, amensalism, or synnecrosis, depending on the advantage or disadvantage derived from the relationship.
in psychiatry, a mutually reinforcing relationship between persons who are dependent on each other; a normal characteristic
of the relationship between a mother and infant. adj., symbiot´ic., adj.

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