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Valid in these dictionaries

TWL/NWL (Scrabble US/CA/TH)
SOWPODS/CSW (Scrabble UK / ALL)
ENABLE (Words with Friends)

Meaning of pacemaker

1 definition found

From WordNet (r) 3.0 (2006) [wn]:

  pacemaker
      n 1: a leading instance in its field; "the new policy will be a
           pacesetter in community relations" [syn: {pacesetter},
           {pacemaker}]
      2: a specialized bit of heart tissue that controls the heartbeat
         [syn: {pacemaker}, {cardiac pacemaker}, {sinoatrial node},
         {SA node}]
      3: an implanted electronic device that takes over the function
         of the natural cardiac pacemaker [syn: {pacemaker},
         {artificial pacemaker}]
      4: a horse used to set the pace in racing [syn: {pacer},
         {pacemaker}, {pacesetter}]

Source : WordNet ® Princeton University. 2010.

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OCTWL / TWL : The official dictionary for scrabble game in United States, Canada and Thailand.
SOWPODS / CSW : UK and the rest of the world uses this dictionary for various word games including scrabble.
ENABLE - This is the default dictionary for Words with Friends.

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