pintail

plural pintails

1. A pintail duck, a type of dabbling duck with a characteristic pointed tail.
   1. A northern pintail, Anas acuta, a dabbling duck of the northern hemisphere that has a long pointed tail.

      Synonyms: cracker, northern pintail, sea pheasant, sea-pheasant, sprigtail

2. A pin-tailed snipe, Gallinago stenura.
3. Any of various species of libellulid dragonfly of the genus Acisoma, endemic to Africa and Asia.
4. engineeringThe end of a fastening pin or mandrel on a Huckbolt or pop rivet that is broken off when installation is complete.

   The collar is placed over the fastener pintail and the installation tool is placed over the pintail. The tool pulls on the pin drawing the parts together until the collar is swaged into locking grooves.

   1994, James William Fitch, Motor Truck Engineering Handbook, page 110

5. hobbiesA surfboard with a pointed back end.