\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}.