• (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 on http://thinkexist.com/dictionary/meaning/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 on http://www.encyclo.co.uk/webster/J/2