Meaning & Definition
noun
A substance or device used to track or identify the path or movement of something.
The scientist used a radioactive tracer to study blood flow in the body.
An object or tool used in drawing to create precise lines or markings.
The architect used a tracer to outline the building design on the plans.
A person or thing that traces or follows a path.
The tracer in the reconnaissance team followed the enemy's movements.
A type of bullet designed to leave a visible trace in the air or in the projectile's path.
The marksman fired tracer rounds to illuminate the target area during the night operation.
Etymology
Derived from the verb 'trace' with the suffix '-er', indicating an agent.
Common Phrases and Expressions
tracer bullet:
A bullet designed to leave a visible trail to help aim accurately.
tracer study:
A research method that tracks subjects or phenomena over time.
tracer gas:
A gas used to detect leaks or measure flow in systems.
Slang Meanings
A fast-paced shooter game featuring characters that can shoot tracers.
In that new game, I just love using the tracer weapon.
Referring to someone who is good at following leads or tracking information.
She's a real tracer when it comes to finding out the truth.