A thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell:
— All cells have a cell membrane.

synonyms: cytomembrane, plasma membrane.

Dutch: celmembraan, plasmalemma, plasmamembraam, celmembraam
Polish: plazmolema, błona plazmatyczna, plazmalemma, błona komórkowa