Assertion: radioactive tracer | /r/HasProperty | radioactive element
Facets:
Source sentences:
text: A radioactive tracer is a radioactive element or compound added to a material to monitor the material's distribution as it progresses through a system.
text: Radioactive tracer: A radioactive molecule that can be sent through the body's circulatory or urinary system, with its progress followed by a radiation-sensitive machine.