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Peen may refer to:

  • part of the head of a hammer, as for example in a ball-peen hammer (also spelled ball-pein or ball and pein)
  • Peening accordingly means the working of metal by hitting with a hammer
  • Steel Belt: Shot Peening an innovative remedial solution for deformed Steel Belts
  • Shot peening a part is bombarded with small spherical media
  • Slang for penis

See also[edit]