The crossword solution for the term 'A Thin Coating or Layer' is FILM. A FILM is a thin layer of material that covers a surface, often used to protect or decorate it. Films can be made from a variety of materials, including plastics, metals, and paper. They are often used in the production of food, pharmaceuticals, and medical devices. Films can also be used to create decorative effects, such as in window films or automotive paint finishes.