Pellicle meaning : A thin skin or film. A skin or coating of proteins on the surface of meat to be smoked, improving the surface adhesion. Cuticle, the hard protective outer layer of certain life forms. The skin of a mushroom cap. The outermost layer of a mushroom, often used only for a surface that is viscid and easily peels off. The growth on the surface of a liquid culture. The photosensitive emulsion of photographic film. A thin plastic membrane used as a beam splitter or protective cover.