membrane

US /ˈmem.breɪn/
UK /ˈmem.breɪn/
"membrane" picture
1.

a pliable sheetlike structure acting as a boundary, lining, or partition in an organism

:
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The cell is surrounded by a protective membrane.
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The eardrum is a thin membrane that vibrates with sound.
:
filmlayerskintissuesheath
2.

a thin sheet of material, typically plastic, used as a separator or lining

:
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A waterproof membrane was installed under the roof tiles.
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The filter uses a semi-permeable membrane to purify water.
:
filmsheetlayerlining