membrane Meaning, Definition & Usage

  1. noun a thin pliable sheet of material
  2. noun a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants
    tissue layer.

WordNet

Mem"brane noun
Etymology
F., fr. L. membrana the skin that covers the separate members of the body, fr. L. membrum. See Member.
Definitions
  1. (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. ✍ The term is also often applied to the thin, expanded parts, of various texture, both in animals and vegetables.

Webster 1913