from
The Collaborative International Dictionary of English v.0.48
Pintail \Pin"tail`\, n.
1. (Zool.) 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}.
[1913 Webster]
2. (Zool.) The sharp-tailed grouse of the great plains and
Rocky Mountains ({Pedioc[ae]tes phasianellus}); -- called
also {pintailed grouse}, {pintailed chicken},
{springtail}, and {sharptail}.
[1913 Webster]