A pellicle; a film on the surface of a liquid or a solid.

gen. A crust or film. Obsolete. rare.

A fine skin, sheet, or covering forming a thin layer or coating on a surface.

transferred. ‘A thin skin formed on the surface of any liquor’ (Johnson); a film or thin coating.

= cuticle, n. 3. Obsolete.

a thin layer on the surface of a solid or a liquid that is differentiated in some way from the underlying bulk material.

A thin coating (of a substance); a film. Originally North American.