D defs.my
Entry 3 senses Webster, 1913

Pounder

/poun'-dẽr/ · Pound·er · IPA /ˈpaʊndɚ/
01 n. One who, or that which, pounds, as a stamp in an ore mill.
  1. 1.
    One who, or that which, pounds, as a stamp in an ore mill.
  2. 2.
    An instrument used for pounding; a pestle.
  3. 3.
    A person or thing, so called with reference to a certain number of pounds in value, weight, capacity, etc.; as, a cannon carrying a twelve-pound ball is called a twelve pounder.