- Chem. any process in which the smaller dissolved molecules in a solution separate from the larger molecules by diffusing through a semipermeable membrane
- Med. any of various procedures, usually performed on a regular basis on patients who have impaired kidney function, in which chemical dialysis is used to remove toxic waste, chemicals, etc. from the blood
Origin of dialysisClassical Latin from Gr, separation, dissolution from dialyein, to separate, dissolve from dia-, apart + lyein, to loose: see lose
- 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.
- Medicine Any of several techniques, especially hemodialysis and peritoneal dialysis, in which filtration through a semipermeable membrane is used to remove metabolic wastes and excess fluid from the blood of people with kidney failure.
Origin of dialysisGreek dialusis separating, dissolution from dialūein to break up, dissolve dia- apart ; see dia- . lūein to loosen ; see leu- in Indo-European roots.
Dated in the late 16th Century CE; from Ancient Greek διά (diá, “inter” “through”) and λύειν (lýein, “loosen”).