feather boa

plural feather boas

1. A boa (“type of long scarf, usually worn by being draped across the shoulders with the ends hanging low, sometimes also with a loop around the neck”) made of feathers, either real or synthetic.

   Mind you, clothes were clothes in those days. […] Frills, ruffles, flounces, lace, complicated seams and gores: not only did they sweep the ground and have to be held up in one hand elegantly as you walked along, but they had little capes or coats or feather boas.

   1977, Agatha Christie, chapter 4, in An Autobiography, part II, London: Collins, →ISBN

2. broadlyIn full feather boa kelp: Egregia menziesii, a lessoniaceous kelp found in intertidal water along the western coastline of North America.