mem ‧ brane /ˈmembreɪn/ BrE AmE noun [uncountable and countable]
[ Date: 1400-1500 ; Language: Latin ; Origin: membrana 'skin' , from membrum ; ⇨ ↑ member ]
1 . a very thin piece of skin that covers or connects parts of your body:
Loud noise can damage the delicate membrane in the ear.
2 . a very thin layer of material that covers something
—membranous /ˈmembrənəs/ adjective