Skip to main content
Select Source:

apheresis

apheresis (əfĕr´əsĬs), or hemapheresis (hē´məfĕr´əsĬs), any procedure in which blood is drawn from a donor or patient and a component (platelets, plasma, or white blood cells) is separated out, the remaining blood components being returned to the body. Apheresis allows the donor's blood volume to replenish itself much more quickly than whole blood donation. One type of apheresis, plasmapheresis, is commonly used in commercial blood banks. In plasmapheresis the plasma (the liquid portion of the blood) is separated from donated blood, the red blood cells being returned to the donor. In some diseases, such as myasthenia gravis, plasmapheresis is used to attempt to remove the disease-causing substances from the blood.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"apheresis." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"apheresis." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/apheresis

"apheresis." The Columbia Encyclopedia, 6th ed.. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/apheresis

APHAERESIS

APHAERESIS BrE, apheresis AmE [Stress: ‘a-FER-e-sis’]. The removal of an element from the beginning of a WORD, usually for informal economy of expression: copter and gator from helicopter and alligator. Sometimes aphaeresis and APOCOPE occur together: tec from detective, flu from influenza. The use of an APOSTROPHE to mark aphaeresis ('gator, 'phone, 'plane) is now rare, expect when used to mark novel or unusual forms, as in 'kyou for ‘thank you’. See APHESIS, CLIPPING, ELISION.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"APHAERESIS." Concise Oxford Companion to the English Language. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"APHAERESIS." Concise Oxford Companion to the English Language. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/humanities/encyclopedias-almanacs-transcripts-and-maps/aphaeresis

"APHAERESIS." Concise Oxford Companion to the English Language. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/encyclopedias-almanacs-transcripts-and-maps/aphaeresis

aphaeresis

a·phaer·e·sis / əˈferəsis/ • n. Linguistics the loss of a sound or sounds at the beginning of a word, e.g., in the derivation of adder from nadder. • (usu. a·pher·e·sis) Med. / ˌafəˈrēsis/ the removal of blood plasma from the body by the withdrawal of blood, its separation into plasma and cells.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"aphaeresis." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 22 Aug. 2017 <http://www.encyclopedia.com>.

"aphaeresis." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (August 22, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/aphaeresis

"aphaeresis." The Oxford Pocket Dictionary of Current English. . Retrieved August 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/aphaeresis