Ammunition whose flight can be observed by a trail of smoke
English: tracer, tracer bullet
tracerEnglish
tracer, tracer bullet
Noun
An investigator who is employed to find missing persons or missing goods
English: tracer
An instrument used to make tracings
English: tracer
1 more noun senses
(radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
English: tracer