From The Collaborative International Dictionary of English v.0.48:

Parkesine \Parkes"ine\ (p[aum]rks"[i^]n or p[aum]rks"[=e]n), n.
   [So called from Mr. Parkes, the inventor.]
   A compound, originally made from gun cotton and castor oil,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
   [1913 Webster]
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