Definitions
1.NounA compound, element, or isotope used to track the progress or history of a natural process.
2.NounA 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.NounThe act or state of tracking or investigating something.
4.NounA request to trace the movements of a person or an object, such as a shipment.
5.NounA person who traces something.
6.NounA device or instrument used to assist in making tracings.
7.NounA process that traces something, such as the path of execution of a program during debugging.