The Collaborative International Dictionary of English v.0.48:

Jackstone \Jack"stone`\, n.
   1. One of the pebbles or pieces used in the game of
      jackstones.
      [1913 Webster]

   2. (pl.) A game played with five small stones or pieces of
      metal. See 6th Chuck. Also called jacks. See
      jack[12], n.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

carangid \carangid\ n.
   any fish of the family Carangidae, including the
   cavallas, jacks, pompanos and scads.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

jacks
    n 1: a game in which jackstones are thrown and picked up in
         various groups between bounces of a small rubber ball [syn:
         jacks, jackstones, knucklebones]