Definition of apheresis in English:

apheresis

(also aphaeresis)

nounaphereses

mass noun
  • 1Linguistics
    Omission of the initial sound of a word, as when he is is pronounced he's.

    ‘In some words initial e has been lost by aphaeresis: squire from esquire, sample from example, state from estate.’
    ‘When the indefinite article was being restored to its separate existence, the word ‘atomy’ was falsely coined from ‘anatomy’ through aphaeresis, by the removal of the supposed indefinite article.’
    leaving out, exclusion, exception, non-inclusion, deletion, erasure, cut, excision, elimination, absence
  • 2Medicine
    A technique by which a particular substance or component is removed from the blood, the main volume being returned to the body.

    • ‘Another method used for separating out some of the components of blood consists of a technique known as apheresis.’
    • ‘Removing blood stem cells from your blood during apheresis doesn't hurt.’
    • ‘Platelets collected by apheresis were counted as single units.’
    • ‘Since most of the patients are not eligible for allogenic transplantation, autologous bone marrow or more increasingly mobilized peripheric blood stem cells obtained by apheresis are used for grafting.’
    • ‘Now, Becky donates just platelets and plasma via a process called apheresis.’

Origin

Mid 16th century via late Latin from Greek aphairesis, from aphairein ‘take away’, from apo ‘from’ + hairein ‘take’.

Pronunciation

apheresis

/ɛɪfəˈriːsɪs/