par·a·bi·o·sis 
(păr′ə-bī-ōsĭs)
(păr′ə-bī-ōsĭs)n. pl. par·a·bi·o·ses (-sēz)
1. The natural or surgical union of anatomical parts of two organisms, usually involving exchange of blood, as in the development of conjoined twins or in certain transplant operations.
2. A temporary suspension of conductivity or excitability in a nerve.
par′a·bi·otic (-ŏtĭk) adj.
par′a·bi·oti·cal·ly adv.