Film (?), n.(Photog.) The layer, usually of gelatin or collodion, containing the sensitive salts of photographic plates; also, the flexible sheet of celluloid or the like on which this layer is sometimes mounted.
Celluloid film(Photog.), a thin flexible sheet of celluloid, coated with a sensitized emulsion of gelatin, and used as a substitute for photographic plates. — Cut film(Photog.), a celluloid film cut into pieces suitable for use in a camera.