1.
a. The clear, yellowish fluid portion of blood, lymph, or intramuscular fluid in which cells are suspended. b. Blood plasma.
2. Medicine. Cell-free, sterilized blood plasma, used in transfusions.
3. Protoplasm or cytoplasm.
4. The fluid portion of milk from which the curd has been separated by coagulation; whey.
5. Physics. An electrically neutral, highly ionized gas composed of ions, electrons, and neutral particles. It is a phase of matter distinct from solids, liquids, and normal gases.