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English definition of “membrane”

membrane

noun [C or U]     /ˈmem.breɪn/ specialized
anatomy a thin piece of skin that covers or connects parts of a person's or animal's body: The cornea is the transparent membrane that covers the front of the eye.Substances and structures in the body engineering a very thin piece of material that covers an openingCoverings and layers biology the outer covering of a cell: a cell membraneCells
(Definition of membrane noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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