cockfeather

noun3

1. •
   Feather on an arrow.

   • Put the arrow-nock on the string, at the place marked for it, with the cockfeather out to the left. — 1879
2. •
   Tailfeather of a cock.

   • The human hair ornament on this man's shoulders is old, but the cockfeather ornaments on his wrist and ankles appear to be a late innovation. — 1973
3. •
   Alternative form of cock feather.