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Noun, pl. membranes

1. A mechanical, thin, flat flexible part that can deform or vibrate when excited by an external force. (

2. A flexible or semi-flexible covering or waterproofing whose primary function is to exclude water. (

3. A thin layer of tissue that covers a surface, lines a cavity, or divides a space or organ. (

1. A thin layer of tissue covering a surface or lining a cavity, space or organ. (

2. A flexible enclosing or separating tissue forming a plane or film and separating two environments (usually in a plant or animal). (

3. A cell membrane. (

1. A thin pliable sheet of material that is permeable to substances in solution. (

Word origin: A term in anatomy, from Latin membrana “a skin, membrane; parchment (skin prepared for writing),” from membrum “limb, member of the body.”

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