9 letters · 12 points in Scrabble
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
noun a medium that disseminates moving pictures
adjective artificial as if portrayed in a film
originFormer trademark of Celluloid Manufacturing Company; from cellulose + -oid.
Etymology from Wiktionary, CC BY-SA 3.0