tracer

1. A person that redraws something that somebody else drew without going outside of the original drawing. Banky was accused of being a tracer in the movie Chasing Amy.
2. A person engaged in searching out missing articles.
3. Also I believe it is something used in warfare. I think it is a type of bullet that leaves a visible trail.

(2) a form of hallucination where something percieved (by any of the five senses) is percieved repeatedly, even though the stimulous was only applied once. e.g. a cigarette butt flies past, you see an entire arc of this motion, repeated many times.

Tracers are usually treated with a strontium salt, which will burn (I believe) with a bright orange-red trail. Salts of other compounds can be used to provide tracer paths of different hues. Note that tracer rounds at best cause a requirement for more frequent cleaning of the weapon and at worst the premature erosion of the lands in the barrel and of the breech.

A passenger vehicle (hereafter "car") from the Mercury branch of the Ford Motor Company. It actually is (or was, in the begining) a rebranded Mazda 323. Nice little "Around town putt-putt", but doesn't stand a chance in a collision at any faster than walking pace. Believe me **groan** I know.

Tra"cer (?), n.

One who, or that which, traces.

© Webster 1913

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.

© Webster 1913