Celluloid \Cel"lu*loid`\ (s[e^]l"[-u]*loid), n. [Cellulose +
   -oid.]
   A substance composed essentially of gun cotton and camphor,
   and when pure resembling ivory in texture and color, but
   variously colored to imitate coral, tortoise shell, amber,
   malachite, etc. It is used in the manufacture of jewelry and
   many small articles, as combs, brushes, collars, and cuffs;
   -- originally called {xylonite}.
   
[1913 Webster]