Celluloid

(noun) 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. Synonyms: celluloid.

(noun) a medium that disseminates moving pictures. Synonyms: film, cinema, celluloid. Examples: "Theater pieces transferred to celluloid." "This story would be good cinema." "Film coverage of sporting events."

(adj) artificial as if portrayed in a film. Synonyms: celluloid, synthetic. Example: "A novel with flat celluloid characters."