Source : Webster's Revised Unabridged Dictionary (1913)

Pintail \Pin"tail`\, n.
   1. (Zo["o]l.) A northern duck ({Dafila acuta}), native of
      both continents. The adult male has a long, tapering tail.
      Called also {gray duck}, {piketail}, {piket-tail},
      {spike-tail}, {split-tail}, {springtail}, {sea pheasant},
      and {gray widgeon}.

   2. (Zo["o]l.) The sharp-tailed grouse of the great plains and
      Rocky Mountains ({Pedioc[ae]tes phasianellus}); -- called
      also {pintailed grouse}, {pintailed chicken},
      {springtail}, and {sharptail}.