The Collaborative International Dictionary of English v.0.48:

dice \dice\ (d[imac]s), n.; pl. of Die.
   Small cubes used in gaming or in determining by chance; also,
   the game played with dice. See Die, n.
   [1913 Webster]

   dice coal, a kind of coal easily splitting into cubical
      fragments. --Brande & C.
      [1913 Webster]