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nounverified·updated May 18, 2026
(radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
Framework senses
- §1
- ammunition whose flight can be observed by a trail of smoke
- §2
- (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
- §3
- an instrument used to make tracings
- §4
- an investigator who is employed to find missing persons or missing goods