dialysis

[dahy-al-uh-sis]
noun, plural dialyses [dahy-al-uh-seez] .
1.
Physical Chemistry. the separation of crystalloids from colloids in a solution by diffusion through a membrane.
2.
Biochemistry. the separation of large molecules, as proteins, from small molecules and ions in a solution by allowing the latter to pass through a semipermeable membrane.
3.
Medicine/Medical. (in kidney disease) the process by which uric acid and urea are removed from circulating blood by means of a dialyzer.

Origin:
1580–90; < Late Latin < Greek diálysis a separation. See dia-, -lysis

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World English Dictionary
dialysis (daɪˈælɪsɪs)
 
n , pl -ses
1.  the separation of small molecules from large molecules and colloids in a solution by the selective diffusion of the small molecules through a semipermeable membrane
2.  med haemodialysis See peritoneal dialysis
 
[C16: from Late Latin: a separation, from Greek dialusis a dissolution, from dialuein to tear apart, dissolve, from luein to loosen]
 
dialytic
 
adj
 
dia'lytically
 
adv

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Etymonline
Word Origin & History

dialysis
1586, from Gk. dialysis "dissolution, separation," from dialyein "dissolve, separate," from dia- "apart" + lyein "loosen" (see lose). Used originally in logic and grammar; chemistry sense is first recorded 1861, medicine 1914.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

dialysis di·al·y·sis (dī-āl'ĭ-sĭs)
n. pl. di·al·y·ses (-sēz')

  1. The separation of smaller molecules from larger molecules or of dissolved substances from colloidal particles in a solution by selective diffusion through a semipermeable membrane. Also called diffusion.

  2. Hemodialysis.


di'a·lyt'ic (-ə-lĭt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
dialysis   (dī-āl'ĭ-sĭs)  Pronunciation Key 
  1. The separation of the smaller molecules in a solution from the larger molecules by passing the solution through a membrane that does not allow the large molecules to pass through.

  2. A medical procedure in which this technique of molecular separation is used to remove metabolic waste products or toxic substances from the blood. Dialysis is required for individuals with severe kidney failure.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
dialysis [(deye-al-uh-sis)]

The separation of large molecules from small molecules by passage through a membrane.

Note: A common treatment for kidney disease is the use of a dialysis machine to filter toxic substances from the blood, a function that the kidneys normally perform.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Doctors placed the latest artificial heart recipient on dialysis today because of insufficient kidney function.
The purpose of this diet is to maintain a balance of electrolytes, minerals, and fluid in patients who are on dialysis.
Only patients in this stage undergo dialysis or receive a transplant.
The entire device is wrapped in a dialysis bag that lets in glucose and oxygen
  from body fluids.
Image for dialysis
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