epinetron

noun1

1. •
   (historical) A piece of Attic pottery worn on a woman's thigh during the preparation of wool, akin to a thimble, and used as a decorative symbol for goddesses and unmarried girls.

   • The epinetron (also called onos, although the original name is uncertain) was a semi-cylindrical object that was closed at one end and designed to fit over the thigh to aid in the production of wool. — 2012