Definition
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noun : TRACER
Source:WordNet 3.1
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1. (
) an investigator who is employed to find missing persons or missing goods ;
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2. (
) an instrument used to make tracings ;
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3. (
) (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes ;
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4. (
) ammunition whose flight can be observed by a trail of smoke ;
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