celluloid (sèl'ye-loid') noun
1. A colorless, flammable material made from nitrocellulose and camphor and used to make photographic film.
2. a. Motion-picture film: "a strange, anachronistic sight: theater pieces transferred to celluloid" (David Ansen). b. The cinema; motion pictures: "There are no heroes but in celluloid" (Charles Langbridge Morgan).

adjective
1. Made of or using a material made from nitrocellulose and camphor.
2. Of or portrayed on film or in motion pictures.
3. Artificial; synthetic: a novel with flat, celluloid characters.