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Noun: plasma membrane  'plaz-mu'mem,breyn
  1. A thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium, potassium or calcium) in and out of the cell
    "all cells have a plasma membrane";
    - cell membrane, cytomembrane

Derived forms: plasma membranes

Type of: semipermeable membrane

Part of: cell

Encyclopedia: Plasma membrane