pyroxyline

/paɪˈrɑksəlin/
noun
  1. A flammable substance made by treating cotton or other plant fibers with nitric and sulfuric acids, used in making explosives, lacquers, and early photographic film.
    • Early movie film was made from pyroxyline, which was highly flammable.
    • The factory produced pyroxyline for use in smokeless gunpowder.
    • Artists once used pyroxyline-based lacquers to give furniture a glossy finish.