artificial kidney

noun3

1. •
   A dialysis machine, an external device that cleans the blood of people with kidney failure; from the 1940s to the 2000s, not portable, but wearable versions now exist.

   • An artificial kidney these days still means a refrigerator-sized dialysis machine. Such devices mimic the way real kidneys cleanse blood and eject impurities and surplus water as urine. — 2013
2. •
   An implantable bionic device to replace the function of a natural kidney, long dreamed of but not yet feasible.
3. •
   A bioengineered (laboratory-grown) biologic kidney (from cultured cells), still experimental.