/ Dictionary / Index P pheresis: Meaning and Definition of Find definitions for: phe•re•sis Pronunciation: (fu-rē'sis, fer'u-), [key] — n. Med. Informal. apheresis, esp. plasmapheresis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pheresis (Thesaurus) Pherae pheromone Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language