D defs.my
Entry 1 sense Webster, 1913

Membrane

/mĕm'-brānˌ/ · Mem·brane · IPA /ˈmɛm.bɹeɪn/
01 n. 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…
  1. 1.
    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.(Anat.)
Phrases & compounds
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 — 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 — See Schneiderian.
Serous membranes — , the membranes, like the peritoneum and pleura, which line, or lie in, cavities having no obvious outlet, and secrete a serous fluid.