boa

1. a constrictor snake which bears live young and may reach great size, native to America, Africa, Asia, and some Pacific islands.
2. a long, thin decorative scarf made of feathers or a similar material, worn by women at parties or as part of fancy dress.

   a sequinned ballgown and feather boa

late Middle English: from Latin (mentioned in the writings of Pliny), of unknown ultimate origin.