tracer
追踪器,追踪者,示踪,跟踪器
Definitions
- 1
- : 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.
- : Also called tracer ammunition. 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.
Examples
Contact tracers tried to identify everyone exposed and figure out where the virus might have come from.
If somebody tests positive for covid-19, contact tracers use it to track down those who got close enough to be potentially infected.
America’s pandemic response has suffered from a well-publicized lack of PPE, of tests, of contact tracers.
Spotting the novel virus as early as possible can signal infectious people to isolate themselves, and help contact tracers identify and notify anyone they’ve been in close quarters with.
Contact tracers in Anne Arundel County reached out to families every day to check on possible symptoms.
Suddenly, the darkness came alive with muzzle flashes and tracer rounds.
First, however, I was injected with a radioactive tracer that allowed activity in my brain to show up on the scan.
Tracer bullets, each with a descending arc, were zinging all around as Rigg swung LCI(L)-88 to the right.
Below us, on Sultan Ismail Street, government troops thrust lances of tracer fire towards a horde of approaching cadavers.
Three men snapped down behind the tracer-guns, firing without aiming, in a frenzied attempt to catch the fleeing sled.
Firing was incessant from the beginning, and the air seemed blue with tracer smoke.
Here I am, a mechanical engineer, about to tackle the job of a professional detective and tracer of missing persons.
A thin stream of glowing red and orange tracer bullets soared up at the plane from the Catanzas side of the bay.
Every tenth bullet was a tracer that made a white trail in the sky allowing you to track them.