TRACER Definition & Meaning

tracer

[trey-ser]

Phonetic (Standard)IPA

noun

a person or thing that traces. trace.
a person whose business or work is the tracing tracing trace 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 tracing trace 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 trace through a biological, chemical, or physical system in order to study the system.

tracer

/ ˈ�ٰ��ɪ��ə /

noun

a person or thing that traces
1. a projectile that can be observed when in flight by the burning of chemical substances in its base
2. ammunition consisting of such projectiles
3. ( as modifier )
  tracer fire
med any radioactive isotope introduced into the body to study metabolic processes, absorption, etc, by following its progress through the body with a gamma camera or other detector
an investigation to trace missing cargo, mail, etc

tracer

An identifiable substance, such as a dye or radioactive isotope, that can be followed through the course of a mechanical, chemical, or biological process. Tracers are used in radioimmunoassays and other laboratory testing. The use of radioactive iodine, for example, can give information about thyroid gland metabolism.
Also called label

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51�Թ� History and Origins

Origin of tracer¹

First recorded in 1535–45; trace ¹ + -er ¹

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Example Sentences

Examples have not been reviewed.

It seemed they were coming from almost every direction, as searchlights raked the sky and skeins of orange tracer fire rose from air defence units stationed around the city.

From

In February he underwent a scan that uses radioactive tracers to see if it had spread.

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And then, much like the ball tracer technology used to review points in professional tennis, an animation showed that Poteet’s pitch had indeed clipped the corner of the strike zone.

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Anti-aircraft guns fire tracer into the sky for hours, aimed at the waves of Russian drones that cross the border near here to attack targets much deeper inside Ukraine – and sometimes in Sumy itself.

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Alzheimer's disease pathology was measured using PET scans with tracers that bind to amyloid plaques and tau tangles that accumulate in the brains of people with Alzheimer's disease.

From

traceless tracer bullet

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