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Biological membrane

selectively permeable membrane that separates the interior of a cell from the external environment or creates intracellular compartments by serving as a boundary between one part of the cell and another

Pronunciation
/bʌɪəʊˈlɒʤɪkəl ˈmɛmbreɪn/
/ˌbaɪəˈlɑʤəkəl ˈmɛmˌbreɪn/