[pin-teyl] 
) -tail. | 1. | a long-necked river duck, Anas acuta, of the Old and New Worlds, having long and narrow middle tail feathers. |
| 2. | sharp-tailed grouse. |
| pin·tail (pĭn'tāl') n. pl. pintail or pin·tails A duck (Anas acuta) of the Northern Hemisphere, having gray, brown, and white plumage and a sharply pointed tail. Also called sprigtail. |