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Definition of: parabiosis
(par′ə·bī·ō′sis) noun
1. Biol. A fusion of two individuals, congenital or by surgery, resulting in mutual physiological intimacy, as in Siamese twins.
2. Physiol. A temporary suppression of the irritability and conductivity of a nerve.
—par′a·bi·ot′ic (-ot′·ik) adjective
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