Poundage

n. [From pound.]

1. A sum deducted from a pound, or a certain sum paid for each pound. Swift.
2. A subsidy of 12 pence in the pound, formerly granted to the crown on all goods exported or imported, and if by aliens, more. [Eng.] Blackstone.

Grants of tonnage and poundage were still in reserve, and they were the main reserve of the crown. Palfrey. 3. (Law.) The sum allowed to a sheriff or other officer upon the amount made by virtue of an execution; — estimated in England, and formerly in the United States, at so much on the pound. Burrill. Bouvier.