Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun tracer

4 senses of tracer

Sense 1
tracer -- (an investigator who is employed to find missing persons or missing goods)
       => detective, investigator, tec, police detective -- (a police officer who investigates crimes)

Sense 2
tracer -- (an instrument used to make tracings)
       => instrument -- (a device that requires skill for proper use)

Sense 3
tracer -- ((radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes)
       => radioisotope -- (a radioactive isotope of an element; produced either naturally or artificially)

Sense 4
tracer, tracer bullet -- (ammunition whose flight can be observed by a trail of smoke)
       => ammunition, ammo -- (projectiles to be fired from a gun)