dialysate

dialysate |dʌɪˈalɪzeɪt |(US also dialyzate ) ▶noun [ mass noun ] the part of a mixture which passes through the membrane in dialysis. • the solution the dialysate forms with the fluid on the other side of the membrane. • the fluid used on the other side of the membrane during dialysis to remove impurities. ORIGIN late 19th cent.: from dialysis + -ate 1; the term originally denoted the part of the mixture which does not pass through the membrane.