noun, plural fol·les [fol-eez] /ˈfɒl iz/.
  1. a bag of copper or bronze coins with a fixed weight, used as money of account in the later Roman Empire.
  2. a silver-plated copper coin of ancient Rome, first issued by Diocletian.
  3. a copper coin of the Eastern Roman Empire, a.d. c500.

Origin of follis

1880–85; < Late Latin; compare Latin follis bag, purse Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018