tracer
noun
a person or thing that traces.
tracers
-
pluralof tracer.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Oxygen isotopes function as tracers, allowing scientists to learn about water sources, plant transpiration, and atmospheric moisture.
From Science Daily ● Nov. 13, 2025
In February he underwent a scan that uses radioactive tracers to see if it had spread.
From Los Angeles Times ● Apr. 27, 2025
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 Science Daily ● Dec. 2, 2024
In fact, scientists have been doing studies like this since the 1960s, releasing tracers such as zinc sulfide powder or sulfur hexafluoride gas into the stratosphere to study air currents.
From Scientific American ● Sep. 20, 2023
There was a loud splintering of shafts as the horse careered onwards, trailing in its wake reins, tracers and shattered timber.
From "Redwall" by Brian Jacques
