/ Dictionary / Index P parabiosis: Meaning and Definition of Find definitions for: par•a•bi•o•sis Pronunciation: (par"u-bī-ō'sis, -bē-), [key] — n. Biol. experimental or natural union of two individuals with exchange of blood. the temporary loss of conductivity or excitability of a nerve cell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. parabasis parablast Related Content Daily Word Quiz: prevalent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language