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radiotracer

[rey-dee-oh-trey-ser] /ˈreɪ di oʊˌtreɪ sər/
noun, Chemistry
1.
a radioactive isotope used as a tracer.
Origin
1945-1950
1945-50; radio- + tracer
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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radio-tracer in Medicine

radiotracer ra·di·o·trac·er (rā'dē-ō-trā'sər)
n.
A radioactive isotope used as tracer.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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