armlet

noun

1. A band worn on the arm for ornamental or identification purposes.

   “The men wear their frizzly hair gathered into a flat circular knot over the left temple, which has a very knowing look, and in their ears cylinders of wood as thick as one's finger, and coloured red at the ends. Armlets and anklets of woven grass or of silver, with necklaces of beads or of small fruits, complete their attire.”

2. A small arm.

   “an armlet of the sea”