1.(linguistics) omission at the beginning of a word as in 'coon' for 'raccoon' or 'till' for 'until' • Syn: aphaeresis • Derivationally related forms: apheretic, aphaeretic (for: aphaeresis) • Topics: linguistics • Hypernyms: omission, deletion 2. a procedure in which blood is drawn and separated into its components by dialysis; some are retained and the rest are returned to the donor by transfusion • Syn: pheresis • Derivationally related forms: apheretic • Hypernyms: dialysis • Hyponyms: plasmapheresis, plateletpheresis