tracer
🇺🇸
/ˈtreɪsər/
🇬🇧
/ˈtreɪsə(r)/
noun
R
A bullet or shell that leaves a visible trail behind it, often used for aiming.
The soldiers used tracer bullets to mark their targets.
R
A radioactive substance used to track the path or function of something inside the body.
The doctor injected a tracer to study the blood flow in the patient's heart.
translation
A bullet or shell that leaves a visible trail behind it, often used for aiming.; A radioactive substance used to track the path or function of something inside the body.
Word Forms
Plural
tracers