
1) Hypothetical technology
Found on
https://www.crosswordclues.com/clue/respirocyte

Respirocytes are hypothetical, microscopic, artificial red blood cells that can emulate the function of its organic counterpart, only with 200 times the efficiency, so as to supplement or replace the function of much of the human body`s normal respiratory system. Still entirely theoretical, respirocytes would measure 1 micrometer in diameter. In ....
Found on
http://en.wikipedia.org/wiki/Respirocyte
No exact match found.