ra·​dio·​trac·​er ˈrā-dē-ō-ˌtrā-sər How to pronounce radiotracer (audio)
: a radioactive tracer

Examples of radiotracer in a Sentence

Recent Examples on the Web These radiotracers decay via positron emission, creating back-to-back gamma rays that are simultaneously detected by a PET scanner. Julie Grisham, Scientific American, 9 July 2019

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'radiotracer.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1946, in the meaning defined above

Time Traveler
The first known use of radiotracer was in 1946

Dictionary Entries Near radiotracer

Cite this Entry

“Radiotracer.” Dictionary, Merriam-Webster, Accessed 12 Apr. 2024.

Medical Definition


ra·​dio·​trac·​er ˈrād-ē-ō-ˌtrā-sər How to pronounce radiotracer (audio)
: a radioactive tracer
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