• Tracer

    Pronunciation

    Origin

    trace + -er

    Full definition of tracer

    Noun

    tracer

    (plural tracers)
    1. (chemistry) A chemical used to track the progress or history of a natural process.
    2. A round of ammunition for a firearm that contains magnesium or another flammable substance arranged such that it will burn and produce a visible trail when fired in the dark.
    3. The act of tracking or investigating something.
    4. A person who traces something.
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