- a thin, soft, pliable sheet or layer, especially of animal or vegetable tissue, serving as a covering or lining, as for an organ or cell
- any thin, flexible layer or material designed to separate, filter, etc.
Origin of membraneClassical Latin membrana, membrane, fine skin, parchment ; from membrum, member
- Biology a. A thin, pliable layer of tissue covering surfaces or separating or connecting regions, structures, or organs of a living organism.b. A semipermeable layer that bounds a cell or an organelle, typically consisting of lipids and proteins.
- A thin, pliable sheet or layer of natural or synthetic material: the resonating membrane of a kazoo.
- A piece of parchment.
- Chemistry A thin sheet of natural or synthetic material that is permeable to substances in solution.
Origin of membraneLatin membrana, skin, from membrum, member of the body.
- A flexible enclosing or separating tissue forming a plane or film and separating two environments (usually in a plant or animal).
- A mechanical, thin, flat flexible part that can deform or vibrate when excited by an external force.
- A flexible or semi-flexible covering or waterproofing whose primary function is to exclude water.
From Latin membrāna (“skin of body”).