Sinking fund
Ballentine's Law Dictionary · James A. Ballentine · 1916
Ballentine's Law Dictionary
One arising from particular taxes, imposts or duties, which is appropriated toward the payment of the interest due on a public loan and for the payment of the principal.
See 162 Pa. 123, 24 L. R. A. 78-1, 29 Atl. 387, quoting Bouvier Law Dictionary.