/ Dictionary / Index P plasmapheresis: Meaning and Definition of Find definitions for: plas•ma•pher•e•sis Pronunciation: (plaz"mu-fu-rē'sis), [key] — n. Med. a type of apheresis in which blood cells are returned to the bloodstream of the donor and the plasma is used, as for tranfusion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plasmapheresis (Thesaurus) plasmapause plasmaphysics Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language