tracer
definition: ammunition whose flight can be observed by a trail of smoke
example:
speech part: noun
synonyms:
tracer bullet
definition: (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
example:
speech part: noun
synonyms:
definition: an instrument used to make tracings
example:
speech part: noun
synonyms:
definition: an investigator who is employed to find missing persons or missing goods
example:
speech part: noun
synonyms: