[{"Bold_text": "noun", "List Items": ["a tough, highly flammable substance consisting essentially of nitrocellulose and camphor: once used in the manufacture of motion-picture and x-ray film, it is now used in a limited line of other products, including guitar picks, musical instruments, and table tennis balls.", "motion-picture film:He was an intense director and a scrupulous editor, famous for leaving piles of celluloid on the cutting-room floor."]}, {"Bold_text": "adjective", "List Items": ["Informal.of or involving motion pictures:a star of the stage who was never lured into the celluloid industry."]}]