What is the plasma?

Plasma is the Greek word, mean “formed” or “molded”. The word ‘plasma’ is first used in science world in the mid nineteenth century by the Czech physiologist Jan Evangelista Purkinje to call the clear fluid after remove the corpuscular material in blood [from Plasma book]. Afterwards, the American scientist Irving Langmuir introduces plasma in physic part in 1922 that the electrons, ions, and neutrals in an ionized gas could similar with that plasma also, called this entraining medium plasma. After that scientists who were motivated by a specific practical problem started to study about plasma physics.