/ Dictionary / Index A apheresis: Meaning and Definition of Find definitions for: a•pher•e•sis Pronunciation: (u-fer'u-sis for 1 af&secu-rē'sis for 2), [key] — n. the loss or omission of one or more letters or sounds at the beginning of a word, as in squire for esquire, or count for account. the withdrawal of whole blood from the body, separation of one or more components, and return by transfusion of remaining blood to the donor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: apheresis (Thesaurus) aphemia aphesis Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language