Symbiont


noun, Biology.
1.
an organism living in a state of symbiosis.
noun
1.
an organism living in a state of symbiosis
symbiont (sĭm’bē-ŏnt’, -bī-) or symbiote
(sĭm’bē-ŏnt’, -bī-)
An organism in a symbiotic relationship. In cases in which a distinction is made between two interacting organisms, the symbiont is the smaller of the two and is always a beneficiary in the relationship, while the larger organism is the host and may or may not derive a benefit. See also host, parasite.

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