Definition of dialysis noun from the Oxford Advanced Learner's Dictionary

 

dialysis

 noun
noun
BrE BrE//ˌdaɪˈæləsɪs//
 
; NAmE NAmE//ˌdaɪˈæləsɪs//
 
[uncountable](specialist)
 
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a process for separating substances from a liquid, especially for taking waste substances out of the blood of people with damaged kidneys kidney/renal dialysis a dialysis machine Word Origin mid 19th cent.: via Latin from Greek dialusis, from dialuein ‘split, separate’, from dia ‘apart’ + luein ‘set free’.
See the Oxford Advanced American Dictionary entry: dialysis