iota

noun3

1. •
   The ninth letter of the Greek alphabet (Ι, ι).

   • As a Greek numeral, iota represents ten.
   • There are twelve iotas on that page.
2. •
   A jot; a very small, insignificant quantity.

   • They never depart an iota from the authentic formulas of tyranny and usurpation. — 1790
3. •
   The Latin letter Ɩ (minuscule: ɩ).

noun1

1. •
   A bank account that earns interest and pays it to a third party, generally a charity; the principal is typically being held in escrow by the accountholder.