celluloid: highly flammable substance made from cellulose nitrate and camphor; used in e.g. motion-picture and X-ray film; its use has decreased with the development of nonflammable thermoplastics
film, cinema, celluloid: a medium that disseminates moving pictures "theater pieces transferred to celluloid", "this story would be good cinema", "film coverage of sporting events"
adjective
celluloid, synthetic: artificial as if portrayed in a film "a novel with flat celluloid characters"
