Hypertext Webster Gateway: "tracer"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Tracer \Trac"er\, n.
1. A person engaged (esp. in the express or railway service)
in tracing, or searching out, missing articles, as
packages or freight cars.
2. An inquiry sent out (esp. in transportation service) for a
missing article, as a letter or an express package.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Tracer \Tra"cer\, n.
One who, or that which, traces.
From WordNet (r) 1.7 (wn)
tracer
n 1: an investigator who is employed to find missing persons or
missing goods
2: an instrument used to make tracings
3: (radiology) any radioactive isotope introduced into the body
to study metabolism or other biological processes
4: ammunition whose flight can be observed by a trail of smoke
[syn: {tracer bullet}]
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