Meaning of parabiosis

par•a•bi•o•sis

Pronunciation: (par"u-bī-ō'sis, -bē-), [key]
— n. Biol.
  1. experimental or natural union of two individuals with exchange of blood.
  2. the temporary loss of conductivity or excitability of a nerve cell.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.