One of the mysteries of the English language finally explained.
1Chemistry and Biology. An apparatus containing a semipermeable membrane for the separation of dissolved and suspended substances in a liquid by means of dialysis.
2Medicine. 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.
Mid 19th century; earliest use found in Thomas Graham (1805–1869), chemist. From dialyse + -er.
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