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tracer

 
Noun tracer has 4 senses
  1. tracer - an investigator who is employed to find missing persons or missing goods
    --1 is a kind of
    detective, investigator, tec, police detective
  2. tracer - an instrument used to make tracings
    --2 is a kind of
    instrument
    Derived forms: verb trace7, verb trace2
  3. tracer - (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
    --3 is a kind of
    radioisotope
  4. tracer, tracer bullet - ammunition whose flight can be observed by a trail of smoke
    --4 is a kind of ammunition, ammo
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