pellicle

Etymology
From, from. .

Noun

 * 1) A thin skin or film.
 * 2)  A skin or coating of proteins on the surface of meat to be smoked, improving the surface adhesion.
 * 3) Cuticle, the hard protective outer layer of certain life forms.
 * 4) The skin of a mushroom cap.
 * 5)  The outermost layer of a mushroom, often used only for a surface that is viscid and easily peels off.
 * 6)  A thin layer supporting the cell membrane in various protozoa.
 * 7)  The growth on the surface of a liquid culture.
 * 8)  The photosensitive emulsion of photographic film.
 * 9)  A thin plastic membrane used as a beam splitter or protective cover.