means Plasma is an ionized gas — a soup of free electrons and charged particles so energized that it conducts electricity and glows, and it's also the pale-yellow liquid part of blood that carries the cells along.

from From Greek 'plasma,' meaning 'something molded or formed,' from the verb 'plassein,' 'to shape or mold' — the same root that gives us 'plastic' and 'protoplasm.' Originally it described a thing that had been given form, and 19th-century science borrowed it for the formless-seeming fluid of blood; the physics meaning came later, in the 1920s, when Irving Langmuir saw the way ionized gas seemed to carry and shape things within it, like blood plasma carrying cells.