parkesine

from The Century Dictionary.

• noun The name given by the inventor, Alex. Parkes, to a plastic material, with properties like those of horn or ivory, obtained by evaporating a solution of pyroxylin to which other substances had been added. Its manufacture was not commercially successful, but it was a precursor of the better-known celluloid.

from the GNU version of the Collaborative International Dictionary of English.

• noun A compound, originally made from gun cotton and castor oil, but later from different materials, and used as a substitute for vulcanized India rubber and for ivory; -- called also xylotile.