- aphaeresis, apheresis - (linguistics) omission at the beginning of a word as in `coon' for `raccoon' or `till' for `until'
--1 is a kind of omission, deletion
- apheresis, pheresis - 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
--2 is a kind of dialysis
--2 has particulars: plasmapheresis; plateletpheresis