pound·er /ˈpaʊndɚ/
  打的人;搗的人;..磅炮;杵
  Pound·er n.
  1. One who, or that which, pounds, as a stamp in an ore mill.
  2. An instrument used for pounding; a pestle.
  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.
  Note: ☞ Before the English reform act of 1867, one who was an elector by virtue of paying ten pounds rent was called a ten pounder.
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  pounder
       n 1: (used only in combination) something weighing a given number
            of pounds; "the fisherman caught a 10-pounder"; "their
            linemen are all 300-pounders"
       2: a heavy tool of stone or iron (usually with a flat base and
          a handle) that is used to grind and mix material (as grain
          or drugs or pigments) against a slab of stone [syn: pestle,
           muller]