1. 
   Jackstone
   Jack'stone` noun (a) One of the pebbles or pieces used in the game of jackstones. (b) ( plural ) A game played with five small stones or pieces of metal. See 6th Chuck .
   Found op http://www.encyclo.co.uk/webster/J/2
   
   
2. 
   Jackstone
   • (n.) One of the pebbles or pieces used in the game of jackstones. • (n.) A game played with five small stones or pieces of metal. See 6th Chuck.
   Found op http://thinkexist.com/dictionary/meaning/jackstone/
   
   

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