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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 tracer

1 definition found

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

  tracer
      n 1: an investigator who is employed to find missing persons or
           missing goods
      2: an instrument used to make tracings
      3: (radiology) any radioactive isotope introduced into the body
         to study metabolism or other biological processes
      4: ammunition whose flight can be observed by a trail of smoke
         [syn: {tracer}, {tracer bullet}]

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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