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Definition of Tracer
1. Noun. An investigator who is employed to find missing persons or missing goods.
2. Noun. An instrument used to make tracings.
3. Noun. (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes.
4. Noun. Ammunition whose flight can be observed by a trail of smoke.
Definition of Tracer
1. n. One who, or that which, traces.
2. n. A person engaged (esp. in the express or railway service) in tracing, or searching out, missing articles, as packages or freight cars.
Definition of Tracer
1. Noun. (chemistry) A chemical used to track the progress or history of a natural process. ¹
2. Noun. A piece 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 at night. ¹
3. Noun. The act of tracking or investigating something. ¹
4. Noun. A person who traces something. ¹
¹ Source: wiktionary.com
Definition of Tracer
1. one that traces [n -S] - See also: traces
Medical Definition of Tracer
1. 1. An element or compound containing atoms that can be distinguished from their normal counterparts by physical means (e.g., radioactivity assay or mass spectrography) and can thus be used to follow (trace) the metabolism of the normal substances. 2. A coloured substance (e.g., a dye) used as a tracer to follow the flow of water. 3. An instrument used in dissecting out nerves and blood vessels. 4. A mechanical device with a marking point attached to one jaw and a graph plate or tracing plate attached to the other jaw; used to record the direction and extent of movements of the mandible. See: tracing. Origin: M.E. Track, fr. O. Fr. Tracier, to make one's way, fr. L. Traho, pp. Tractum, to draw, + -er, agent suffix (05 Mar 2000)
Lexicographical Neighbors of Tracer
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