- a person or thing that traces.
- a person whose business or work is the tracing of missing property, parcels, persons, etc.
- an inquiry sent from point to point to trace a missing shipment, parcel, or the like, as in a transportation system.
- any of various devices for tracing drawings, plans, etc.
- ammunition containing a chemical substance that causes a projectile to trail smoke or fire so as to make its path visible and indicate a target to other firers, especially at night.
- the chemical substance contained in such ammunition.
- a substance, especially a radioactive one, traced through a biological, chemical, or physical system in order to study the system.
- a person or thing that traces
- a projectile that can be observed when in flight by the burning of chemical substances in its base
- ammunition consisting of such projectiles
- (as modifier)
- any radioactive isotope introduced into the body to study metabolic processes, absorption, etc, by following its progress through the body with a gamma camera or other detector
- an investigation to trace missing cargo, mail, etc
