tracer
英 ['tre?s?]
美['tres?]
- n. [核] 示蹤物；追蹤者；描圖者；（鐵筆等）繪圖工具
- n. (Tracer)人名；(英)特雷瑟
英英釋意
- 1. an investigator who is employed to find missing persons or missing goods
- 2. an instrument used to make tracings
- 3. (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
- 4. ammunition whose flight can be observed by a trail of smoke