tracer (suomeksi)

merkkiaine (s: A chemical used to track the progress or history of a natural process)
jäljityslaite (s)
valojuovaluoti (s: A piece of ammunition for a firearm that contains magnesium or another flammable substance)
markkeri (s: A chemical used to track the progress or history of a natural process)
valojuova-ammus (s: A piece of ammunition for a firearm that contains magnesium or another flammable substance)