Photographic film that is needed to produce X-ray pictures: When Susan was being examined at the dentist's office, she had to hold a dental X-ray film with her teeth during a radiography.

Film is an abbreviation of an X-ray, a radiograph.

A process for making inexpensive Gallium Arsenide (GaAs) photovoltaic cells in which a thin film of GaAs is grown on top of a thick, single-crystal GaAs (or other suitable material) substrate and then is cleaved from the substrate and incorporated into a cell, allowing the substrate to be reused to grow more thin-film GaAs.