coq

plural coqs

1. A trimming of cock feathers on a woman's hat.

   […] with a flat Tam crown of heliotrope velvet, a drapery under the brim, and two flat coq feathers.

   1897, Ladies' home journal: Volume 15

   2 more examples

   A smart all-black model has just arrived from Jeanne Due. It is turban-trimmed with black coq which forms a bow drape.

   1921, Millinery trade review: Volume 46

   It was the Spanish rooster, the bird that produced coq feathers, that sacrificed the most plumage. Coqs, the rooster's long, curved, and iridescent tail feathers, were plucked from the bird to trim hats or, in this case, masks.

   2010, Deborah Davis, Party of the Century

alternative Coq.

1. Coquihalla (a location in British Columbia)