goldback

noun3

1. •
   Any member of species Pentagramma triangularis of ferns.
2. •
   Any member of genus Pityrogramma of ferns.
3. •
   (US, slang) A kind of gold certificate with an orange back.

noun1

1. •
   A fractional gold commercial product marketed as a local currency and commodity which has seen limited use in some U.S. states, shaped like a banknote but containing a small amount of 24-karat gold.