tracer

Definition

A compound, element, or isotope used to track the progress or history of a natural process.

Etymology

From trace + -er.

Example Sentences

• "We have a five-man tracer on him now. He's heading for a Vorster cell on Michigan Boulevard, and he's drunk as a lord. Should we intercept him?"
• "A surveyor typically conducts a tracer on his or her own and later meets up with the rest of the team to discuss findings."
• "Ain't never running but I'm a paper chasing They gon catch up to me, they gon need a pacer How they over-watching me without a tracer"