der Tracer
Translation
tracer, tracer bullet
Examples
Ein radioaktiver Tracer wurde verwendet.
A radioactive tracer was used.
Das Geschoss war ein Tracer.
The projectile was a tracer.
Grammar Patterns
to use ((sth.)) as a tracer Man verwendet Isotope als Tracer.
Similar Words
die Markierungssubstanz (marking substance), das Leuchtspurgeschoss (tracer bullet)
Etymology
From English 'to trace'. An agent or device used to follow the path of something.
Memory Tips
It's the same as the English word 'tracer'. Just learn the German article 'der'.