PLASMA -
Noun: The clear, almost colourless liquid part of blood or lymph , in which the blood cells float. It is found in the veins. It consists of water, salts, proteins, and other substances, and it makes up the largest part of the blood. Plasma can be kept indefinitely by freezing or drying and is often used in transfusions in place of whole blood.

Greek - plásma = to form or mould

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