/ ˈplæzmə; NAmE / (also plasm / ˈplæzəm/) noun [ U ]
( biology or medical ) the clear liquid part of blood, in which the blood cells, etc. float
( physics ) a gas that contains approximately equal numbers of positive and negative electric charges and is present in the sun and most stars
early 18th cent. (in the sense mould, shape ): from late Latin , literally mould , from Greek plasma , from plassein to shape.