dialyser
/ˈdʌɪəlʌɪzə/(also dialyzer)
noun
1 Chemistry and Biology. An apparatus containing a semipermeable membrane for the separation of dissolved and suspended substances in a liquid by means of dialysis.
2 Medicine. An apparatus or machine used to perform therapeutic dialysis; specifically = haemodialyser. Also: a detachable unit or cartridge containing membranes or filters for use in a dialysis machine.
Origin
Mid 19th century; earliest use found in Thomas Graham (1805–1869), chemist. From dialyse + -er.