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apheresis
apheresis , or hemapheresis , 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. |
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"apheresis." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "apheresis." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-apheres.html "apheresis." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-apheres.html |
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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.
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TOM McARTHUR. "APHAERESIS." Concise Oxford Companion to the English Language. 1998. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. TOM McARTHUR. "APHAERESIS." Concise Oxford Companion to the English Language. 1998. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O29-APHAERESIS.html TOM McARTHUR. "APHAERESIS." Concise Oxford Companion to the English Language. 1998. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O29-APHAERESIS.html |
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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. |
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Cite this article
"aphaeresis." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "aphaeresis." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O999-aphaeresis.html "aphaeresis." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-aphaeresis.html |
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