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membrane    : [m'ɛmbr,en]
Membrane \Mem"brane\, n. [F., fr. L. membrana the skin that
covers the separate members of the body, fr. L. membrum. See
{Member}.] (Anat.)
A thin layer or fold of tissue, usually supported by a
fibrous network, serving to cover or line some part or organ,
and often secreting or absorbing certain fluids.
[1913 Webster]

Note: The term is also often applied to the thin, expanded
parts, of various texture, both in animals and
[1913 Webster]

{Adventitious membrane}, a membrane connecting parts not
usually connected, or of a different texture from the
ordinary connection; as, the membrane of a cicatrix.

{Jacob's membrane}. See under {Retina}.

{Mucous membranes} (Anat.), the membranes lining passages and
cavities which communicate with the exterior, as well as
ducts and receptacles of secretion, and habitually
secreting mucus.

{Schneiderian membrane}. (Anat.) See {Schneiderian}.

{Serous membranes} (Anat.), the membranes, like the
peritoneum and pleura, which line, or lie in, cavities
having no obvious outlet, and secrete a serous fluid.
[1913 Webster]

n 1: a thin pliable sheet of material
2: a pliable sheet of tissue that covers or lines or connects
the organs or cells of animals or plants [synonym: {membrane},
{tissue layer}]

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English Dictionary  2005-2009

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