Noun
The dropping of a letter or syllable from the beginning of a word; e. g., cute for acute.
An operation by which any part is separated from the rest.
Source: Webster's dictionaryDuring a plasma donation, an apheresis machine separates the parts of the blood, collecting only the plasma and returning everything else back to the donor. Source: Internet
The collection process for this type of plasma is the same as standard apheresis collection, she noted. Source: Internet